Postgresql array to row

 

Postgresql array to row. So rows 1, 2, and 3 should be returned. . PostgreSQL does this only when comparing the results of two row constructors (as in Section 9. Table 9-42 shows the functions available for use with array types. Each row contains values of IDs from table items in specific order. PostgreSQL allows composite types to be used in many of the same ways that simple types can be used. maxup) as num. Another option if you know the max length of the array is to use generate_series to get all numbers from 1 to max length and cross joining the array table on cardinality. SELECT array_dims(ARRAY[1,2] || ARRAY[[3,4],[5,6]]); array_dims ----- [1:3][1:2] (1 row) An array can also be constructed by using the functions array_prepend , array_append , or array_cat . But this query cannot use an index. This function is particularly useful when dealing with arrays in PostgreSQL. SELECT shop, jsonb_array_elements(receipt) as arr. PostgreSQL allows columns of a table to be defined as variable-length multidimensional arrays. Mar 10, 2014 · 1) Calculate number of elements in data array. To defend against any possible folly in column names, you can concatenate the string argument for crosstab() and escape it with format() or quote_literal(). Sep 3, 2019 · 2. 3 / 9. sql package … Array. FOREACH x IN ARRAY $1. 2) Create varchar array condition to match every "row". 4 / 9. with lines as (. json_array_element_text(colnames, colno) AS colname, json_array_element_text(colvalues, colno) AS colvalue, rn, idx, colno. In my case, I needed to work with a column that has the data, so using IN () didn't work. FROM information_schema. Example: May 23, 2014 · The ARRAY function is built into PostgreSQL, and turns a set of rows into an array. points_id and order_id = orderId. id = mod. While I was reading about "simulating row_number", I tried to figure out another way to do this. ウィンドウ関数; とりあえず、全体で通番を振ってみます。 unnestしたものにrow_number() OVER()使って全体に対して通番を振る形 IN vs ANY operator in PostgreSQL; Important difference: Array operators (<@, @>, && et al. column) is a shortened form of a lateral join which effectively joins every row from categories with virtual table created by jsonb_to_recordset function from jsonb array in that same row. Since the expanded array gives you text elements you have to cast them into integers using ::int. How to select rows after using row_number() in Aug 24, 2012 · 12. For example, a column of a table can be declared to be of a composite type. nodes is an array of bigint. function, there are other methods to convert columns to rows in PostgreSQL. Consider 3 tables: student_master(id,student_name); subject_master(id,subject_name); marks(id,student_id,student_id,subject_id,marks) Jul 10, 2018 · I'd like to write a query that will return the rows where data contains tags tag2 or tag3. The JSON array to be converted, the elements of which are JSON objects. This is referred to as array expansion. 4 (This is a change from versions of PostgreSQL prior to 8. The closest thing available is unnest: expand an array to a set of rows You can either aggregate the rows into an array and then convert them: SELECT to_jsonb(array_agg(t)) FROM t or combine json_agg with a cast: SELECT json_agg(t)::jsonb FROM t My testing suggests that aggregating them into an array first is a little faster. To extend an array to a list of rows, PostgreSQL provides the unnest PostgreSQL: Documentation: 9. Below is the right way to do it by using the built-in unnest() function (requires PostgreSQL 8. For example, in the Customer details table, specific customers have two contacts in the customer phone numbers array. 2. The other alternative I am considering is to use an array, so instead we will The PostgreSQL row_to_json() function returns a JSON object converted from a value of a specified SQL composite type. 1 with standard_conforming_strings= on: CREATE TEMP TABLE tbl(. The key is the id of each row, and the values is a jsonb object made of all columns of the table except id. 22. I'm hoping that someone can point out what I'm missing. Using CASE statements: You can use CASE statements in the SELECT clause to convert columns to rows. SELECT *. Use the contains operator on an array. May 24, 2014 · The INTERSECT operator in PostgreSQL can easily do that with two sets of rows — but there isn’t any equivalent for arrays. Sep 16, 2021 · Unfortunately, the version I have doesn't support jsonb_path_query, @melcher I just started the query beginning with SELECT id, jsonb_array_elements(content -> 'fields') -> '001', jsonb_array_elements(content -> 'fields') -> '856' -> 'subfields' The problem I'm getting is each data element I want is being returned on a separate row (e. FROM (. The third row is spiked with meta-characters: Dec 1, 2013 · PostgreSQLのあまり知られていない型3種. Is there something like a zip() function in PostgreSQL that combines two arrays? You could use a cleaner form with generate_subscripts() or other techniques, but those would be much more verbose. You can use json aggregation functions: select jsonb_object_agg(id, to_jsonb(t) - 'id') res. Oct 18, 2021 · select array_to_json(array_agg(row_to_json(t))) from (select * from fastSubquery)t. *, urd AS user_role. The first element has an index of one. 14 for more details about array operator behavior. objectID intent MyArrayValue ABC Large Blue ABC Small Black ABC Regular [NULL] ABC Medium [NULL] May 17, 2017 · What I'd like to do is convert the right side of a join into an array so the result is one row. Now what I am trying to do is generate following structure. For this reason, the three functions, array_agg(), unnest(), and generate_subscripts() are described in the Feb 16, 2017 · CREATE TABLE matrix ( ROW CHAR, COL INT, VALUE ) and fill it with your matrix then you can query it using : SELECT ROW, SUM (VALUE) FROM matrix GROUP BY COLUMN ORDER BY ROW; or similar. 5 or later a overloaded variant of array_agg() takes array input as provided by @a_horse. SELECT client_id, MAX( CASE seq WHEN 1 THEN result ELSE '' END ) AS result1, MAX( CASE seq WHEN 2 THEN result ELSE '' END ) AS result2, MAX( CASE seq WHEN 3 THEN result ELSE '' END ) AS result3, Aug 4, 2020 · You could create an ARRAY from VALUES and then unnest it: SELECT unnest(ARRAY[col_a, col_b, col_c]) FROM (VALUES('A','B','C')) AS x(col_a, col_b, col_c) Result: array_shuffle(ARRAY[[1,2],[3,4],[5,6]]) → {{5,6},{1,2},{3,4}} array_to_string ( array anyarray, delimiter text [, null_string text ] ) → text. Aug 10, 2012 · 59. Array to columns in PostgreSQL when array length is non static. Table 9. This example shows how to use the PostgreSQL row General-Purpose Aggregate Functions. 0. I’m going to use PostgreSQL’s concatenation operator Jan 9, 2019 · From searching, I found that array_agg() does the exact opposite. So now we have all our function so we write our query to get out list of pain You can't alias composite rowtypes using AS, so you need to use an aliased subquery expression or CTE to achieve the effect: select row_to_json(row) from (. For example, I have a table with rows of Companies and I would like to combine multiple companies into a single array value of another table? I tried: Insert into id_companies select individual, company_name from company_info. array_agg. 23). select ur. Use the unnest() function to expand an array to a list of rows. FROM content_cards cc CROSS JOIN. Apr 11, 2009 · This is the answer. Prepend and append an array. I suspect that this is because the cast has to parse the entire JSON result. For example: {2,4,233,5}. You can use the array () and array_to_string () functions togetter with your query. _pg_expandarray in a SELECT query to get one row per value in the array. only each row needs to be a TEXT[] with array values corresponding to column values casted to TEXT coming in the same order as in SELECT * so assuming the table has columns a, b and c I need the result to look like. duty_id. 3: JSON Functions and Operators. – Feb 4, 2021 · 5. 9. category, json_agg(row_to_json(row(mod. Concat arrays. ) SELECT id, selected_placements[num] as selected_placement. Arrays of any built-in or user-defined base type, enum type, composite type, range type, or domain can be created. To be clear, cardinality "returns the total number of elements in the array, or 0 if the array is empty", which is what you would expect of array_length, but the later returns NULL when length is zero. The problem is with the outer layer of quotes. FROM. FROM receipts. select 1 as id, array['a', 'b', 'c'] as selected_placements. This is the syntax of the PostgreSQL json_to_recordset() function: Required. Here is the modified query: SELECT. SELECT id, array_agg(ARRAY[x, y]) AS xy FROM tbl GROUP BY id; The manual: Concatenates all the input arrays into an array of one higher dimension. ) select shop, arr->>0 as product, arr->>1 as quantity, arr->>2 as price. Explore advanced array comparison techniques using ANY/SOME and ALL. g. 1 you can use FOREACH LOOP to iterate over an array. modelName))) vehicles from categories cat left join models mod on cat. Details in this related question: How to preserve the original order of elements in an unnested array? Postgres 9. The jsonb_array_elements() function allows you to expand the top-level JSON array into a set of JSON values. ) expect array types as operands and support GIN or GiST indices in the standard distribution of PostgreSQL, while the ANY construct expects an element type as left operand and can be supported with a plain B-tree index (with the indexed expression to the Sep 3, 2021 · 2. id = order_points. id is of type bigint, as it is the primary key in the table. FROM (SELECT cc. 8. Similarly, the UNION operator lets me join two sets of rows, but nothing like that exists for arrays. 3) Process elements on individual rows. The first two only support one-dimensional arrays, but array_cat supports multidimensional arrays. Something like that: CREATE OR REPLACE FUNCTION add_ar Aug 26, 2011 · 1. jsonb_object_agg() aggregates key/value pairs into a single object. Converts each array element to its text representation, and concatenates those separated by the delimiter string. PostgreSQL array_to_json() 函数将一个 SQL 数组转为 JSON 数组并返回。 This table contains array type field. postgresql. from cte where ed<l. FROM tbl, string_to_table(subject, ' ') token. Sep 26, 2019 · 1. Minimal form: SELECT token, flag. Introduction to the PostgreSQL jsonb_array_elements () function. Declaration of Array Types #. Is there some kind of reverse array_agg() or any other method to get that result? Also, it would be great if I could also get another column with the position that that row had in the original array: Nov 1, 2021 · You can use the STRING_AGG function to accomplish this goal, so long as you first convert the car_id to a string:. Jun 1, 2023 · 行に変換するだけならばunnestを使うだけで終わりなのですが、順序を付けようとなると思いつくのはWindows関数のrow_numberです。 9. You were almost there, you only have to fetch each element from the array you extracted as you can see below. SELECT * FROM games WHERE id IN (SELECT gameid FROM player_games WHERE player='<player>') Since I will be inserting tens of thousands of games per day, I am looking for ways to efficiently store data in player_games. The following example uses the to_jsonb() function to convert an array in PostgreSQL to a JSON array with the JSONB type: Feb 4, 2014 · Convert string to array of arrays in PostgreSQL 0 How to convert one row text from a result of a query into a string that can be used in another query in PostgreSQL? Use a LATERAL join - with string_to_table() in Postgres 14+. sjournalid. This is a Postgres built-in since a few versions so you no longer need to define your own, the name is array_agg(). Convert array to rows in Postgres. WHERE flag = 2; The comma in the FROM list is (almost) equivalent to CROSS JOIN, LATERAL is automatically assumed for set-returning functions (SRF) in the FROM list. You can unpack the json with something like: SELECT. That is, ARRAY expects to get rows as its input, and returns a single row, containing a single array, as its output. The JDBC driver provides functions that map Java arrays to their corresponding PostgreSQL arrays. Unnest arrays for detailed record exploration in your PostgreSQL database management. I need to append received JSON array into that field without overriding existing values. 1. s int8 := 0; x int; BEGIN. For example, if we want to know ISBN-13 of all available books in the books table, we can use the -> operator as follows: SELECT attr -> 'ISBN-13' AS isbn. You may want to view the same page to_jsonb -----null (1 row) Code language: SQL (Structured Query Language) (sql) 5) Converting a PostgreSQL array into a JSON array. schema. ORDER BY 1,2,3. With SELECT array( SELECT id FROM table ); you will get a result like: {1,2,3,4,5,6} Then, if you wish to remove the {} signs, you can just use the array_to_string () function and use comma as separator, so: SELECT array_to_string( array( SELECT id FROM Aug 2, 2023 · Access array items. SELECT. DECLARE. 4) We would need a json_array_elements_text(json), the twin of json_array_elements(json) to return proper text values from a JSON array. sjournalidfk = j. And the data type of "result array" is an array of the data type of the tuples. 5. *, d. from users u. amount as amount FROM points LEFT JOIN order_points ON points. Return number of row in postgresql. Mar 23, 2016 · Here FROM x, function(x. Thanks to @Quassnoi for his examples. Solution 2 Learn how to effectively query arrays in PostgreSQL. item_id = elems. WHERE table_name = 'aean'. ,txt text. Concatenates all the input arrays into an array of one higher dimension. Aug 17, 2015 · will require a bunch of dynamic SQL, because you don't know the types of the columns in advance, nor the column names. table_name. SELECT ARRAY[a::TEXT, b::TEXT, c::TEXT] Nov 20, 2013 · It's hacky, but what about using an array for each property in the object (and its corresponding scalar type). This function splits the column data at the (regexp) given delimiter (the comma in your case) and transforms the split parts into separate rows. 4. Mar 10, 2014 · I am trying to create a PostgreSQL function where I will loop over the rows of a query and store some of them in an array, before doing more stuff with it Aug 19, 2019 · You can use built-in PostgreSQL's functions to build JSON objects. If the parameter pretty is true, the row_to_json() function will prettify the JSON by adding newlines between top-level elements of the output JSON object. Update: I need an equivalent of the following SQL statement Is it possible to make native Postgresql SELECT to get results like below: Postgres Arrays Rows aggregation. The standard json_agg returns what I want but it returns array of objects (where object keys are column names) For example this query: SELECT json_agg(data_rows) FROM (. Nov 22, 2022 · This query returns a row with id as text and data as jsonb. json_agg(row(t. Now, I want to get data from table items for chosen row from table some_chosen_data_in_order with order for elements in array type. I've been looking at the postgresql JSONB documentation and it's not clear to me how to query a nested structure like this. from user_roles ur. Apr 4, 2017 · I have table where one of the fields is JSON array. Apr 22, 2018 · DECLARE columns_values_concatenated TEXT := ''; BEGIN. You should use the jsonb_to_recordset(jsonb) function, from the official PostgreSQL docs. postgresql. 16. from. In other contexts Mar 27, 2012 · Today, I was asked how to select each element in an array as a separate row. But that seems to be missing from the provided arsenal of JSON functions. value::int. This documentation is for an unsupported version of PostgreSQL. In this case, we need to apply jsonb_to_recordset to the actual jsonb itself. The other is to use an array constructor: SELECT ARRAY(. Mapping is database-specific and is defined in PostgreSQL JDBC’s org. Aggregating data by column in array. Syntax: unnest (anyarray) Return Type: setof anyelement. An array’s values can be divided into rows. Here's an exampl Apr 22, 2014 · I need to convert from an array to rows and back to an array for filtering records. Jun 13, 2020 · 9. select u. postgresに限らずRDBMSでテーブル設計をする上で適切な型を選ぶことは重要です。. Each CASE statement will check the condition and return the corresponding value as a new column. 19. These can be divided into various rows. 5: with content_cards as (. I need to query a table as in. *)) AS users. ) jd on jd. category; The result will be Feb 16, 2018 · I can use jsonb_array_elements to expand out each array into rows: select jsonb_array_elements(col) from example Returns: jsonb_array_elements "a" "b" "c" "d" "e" I want the index of each array element along with the element itself (a bit like Python's enumerate), like so: Aug 23, 2019 · PostgreSQL: Merge Columns and rows into array. 5 / 9. Jul 18, 2020 · Before these arrays can be stored in PostgreSQL, however, they need to be mapped to the Interface provided in the java. 2 May 8, 2020 · Postgres 11. See "Array_agg in postgres selectively quotes" and the documentation: "Aggregate Functions". My solution is: select. A composite type represents the structure of a row or record; it is essentially just a list of field names and their data types. ) select val from cte. If you tried to expand those arrays into individual columns, you'd end up with two rows in a result set that have different numbers of columns and that is not allowed. from lines; Dec 22, 2018 · ON i. Is there a better approach less time consuming? UPD: json_agg (t) shows similar result. This is the query I used to get my existing format that I Aug 1, 2020 · Also the first array (MyArray) is expanding to multiple rows, but it does'nt create row for each of the record created by the first array expansion. There are a number of reasons why I might want to do this. Edit: I'm using PostgreSql 9. Postgresql hstore provides the -> operator to query the value of a specific key from an hstore column. group, regexp_split_to_table(id, ',') FROM mytable. Remove array items. (SELECT abbrev, order_points. The following is tested and works, albeit in 9. i am getting output like this. Nov 29, 2020 · 2. ,txtarr text[] ); The column txtarr is just there to demonstrate syntax variants in the INSERT command. id Jan 30, 2018 · EXISTS because we want each qualifying row once, even if multiple array elements can contain the key. You can generate a text array of unique keys in the given jsonb array of records - and wrap the expression into a simple IMMUTABLE function: Aug 30, 2016 · In Postgres 9. SELECT array_agg(abbrev), array_agg(CASE WHEN amount IS NULL THEN 0 ELSE amount END) into column_names, column_values FROM. Expression index. I would like to create a new table, where the nodes in the node arrays are the keys and the only other column is an array of ids that correspond to that node. select row_to_json(result) from (select * from employee) as result; select row_to_json(result) from (select * from student) as result; PostgreSQL now has a function json_agg that can be used in lieu of array_to_json(array_agg( )) but actually behaves better in some cases. 53 shows the specialized operators available for array types. Demo on DB Fiddle. In addition to those, the usual comparison operators shown in Table 9. Collects all the input values, including nulls, into an array. columns. inner join role_duties d on d. 5). ) expect array types as operands and support GIN or GiST indices in the standard distribution of PostgreSQL, while the ANY construct expects an element type as left operand and can be supported with a plain B-tree index (with the indexed expression to the . select a,a[strt+1:ed+1],strt+1,ed+1,l. SELECT * FROM. Returns an arbitrary value from the non-null input values. This will work fine if the matrix is of a reasonable size (like not billions of elements) answered May 31, 2010 at 8:03. 24. TypeInfoCache file. 5) or comparing a row constructor to the output of a subquery (as in Section 9. 15. 2. Use the data_type [] to define a one-dimensional array for a column. id int. 2: older versions would claim that two arrays with the same contents were equal, even if the number of dimensions or subscript ranges were different. Array Functions and Operators #. But there are cases in which I would like to do the opposite — turn a PostgreSQL array to rows. Finding rows with arrays that include all elements of another array: SELECT * FROM my_table WHERE data @> '{item1,item2}'; The @> operator stands for ‘contains’. Jul 13, 2022 · Extend Array in PostgreSQL. Given the following array : "char"[] {i,i,o,t,b} _pg_expandarray retuns 5 rows with 1 column of type record : Nov 13, 2023 · The unnest () function in PostgreSQL is used to expand an array into a set of rows. One is to aggregate: SELECT array_agg(column_name::TEXT) FROM information. One option would be using json_each function to expand the outermost JSON object into a set of key/value pairs, and then extract array elements by using json_array_elements : elm->>'rutaEsquema' as rutaEsquema, elm->>'TipoDeComponente' as TipoDeComponente, elm->>'detalleDelComponente' as detalleDelComponente. I put the answer in jsonb format so we don't have to create separately-typed columns and the fundamental types and arrays would be preserved. answered Apr 16, 2013 at 1:19. Here are a few alternative methods: 1. Example with 3 tables: CREATE TABLE items ( id serial primary key, title text ); CREATE TABLE tags ( id serial primary key, title text ); CREATE TABLE items_tags ( item_id int references items(id), tag_id int references tags(id), primary key (item_id Oct 13, 2021 · So we do another trick to convert this var char list into an array with this very long function regexp_split_to_array. Moreover, and again for the special case of one-dimensional arrays, the function generate_subscripts() can be used to produce the same result as unnest(). You can override this by explicitly casting the array constructor to the desired type, for example: May 19, 2016 · How do i insert values into an array from a selection of values from multiple rows in a table in Postgresql. It takes an array as input and returns a new table where each element of the array occupies a separate row. Note that no ORDER BY is specified, so the order of the result rows depends on the grouping method used (here, hash) ie, it is not defined. jdbc2. Aug 3, 2010 · packing your tuples into an array for each row is a bad idea; Share. And it's faster. ROW_TO_JSON function in postgres converts a row of a table to a JSON object. Retrieve array contents, specify array elements, and use WHERE clauses to filter based on array values. postgresは ユーザ定義の型 を作成できることはご存知かと思いますが、C言語で記述する必要があるため気軽に欲しい型を定義、とは中々 Jun 1, 2023 · 行に変換するだけならばunnestを使うだけで終わりなのですが、順序を付けようとなると思いつくのはWindows関数のrow_numberです。 9. Feb 3, 2012 · Aggregate key-value pairs into a 2-dimensional array. SELECT column_name. If you want to use the id values directly after the expand, it can be Mar 27, 2017 · I need a procedure for delete multiple rows in multiple tables by passing array set of values in parameters. I'm trying to unpack an array where each item has multiple elements, and can't seem to get the syntax right. You can use regexp_split_to_table() for this: demo:db<>fiddle. Peter Tillemans. With this you are able to join against your second table directly. Feb 20, 2020 · 5. Development Versions: 17 / devel. 8). 3. *, generate_series(1, ccup. row_to_json() Examples. id = ur. select cat. FROM table_schema. *, row_to_json(jd) as journal from journal j. Every type can be cast to text, so it's the obvious choice here. 4+): SELECT UNNEST(ARRAY['Julio','César','de','León']) AS names SELECT ARRAY[1,2,3+4]; array ----- {1,2,7} (1 row) By default, the array element type is the common type of the member expressions, determined using the same rules as for UNION or CASE constructs (see Section 10. Jun 13, 2014 · 1. a in the cte is the array. Let’s start with a set of rows, containing the descriptions of today’s appointments. Array element have to be of the same type. A single array column could have, for example, one array with three elements and another with five elements. ) and I will do a player lookup along the lines of. Oct 30, 2023 · UNNEST. Unsupported versions: 11 / 10 / 9. @shaunc: I see, you are right. Filter by an array element. select * from journaldetail. Otherwise additional processing is required to change the jsonb to something else, especially in the array case. My attempt was JOIN: Jan 10, 2017 · However, by writing this query as per this post the query is: select j. edited Apr 16, 2013 at 1:25. id, cat. ) Oct 2, 2017 · union all. Then use lead to get slices of the array and omit the There are two ways. ) See Section 8. Here is my solution: SELECT column(s) FROM table WHERE expr|column = ANY(STRING_TO_ARRAY(column,',')::INT[]) I spent almost 6 hours before I stumble on the post. 6 / 9. To illustrate the use of array types, we create this table: In PostgreSQL, an array is a collection of elements with the same data type. Jan 6, 2024 · In addition to basic manipulations, PostgreSQL offers advanced features for array operations: Using Array Expressions. and the output is like this : { journalid : 1, totalamount : 1000, journaldetails : The PostgreSQL json_to_recordset() function expands the specified top-level JSON array (its elements are objects) into a set of rows with the type defined in the AS clause. I'm using information_schema. rate, mod. inner join (. Since PostgreSQL 9. Documentation → PostgreSQL 9. To quote the docs: Expands the top-level JSON array of objects to a set of rows having the composite type defined by an AS clause. category_id group by cat. 7. 1. The comparison operators compare the array contents element-by-element, using the default B-tree comparison function for the element data May 24, 2014 · I’ve spent the last few blog posts in this series talking about PostgreSQL’s arrays — how to create them, query them, and even create them with the ARRAY function. Supported Versions: Current ( 16 ) / 15 / 14 / 13 / 12. I replaced the single quotes with dollar quoting. PostgreSQL 9. If you have a data model layer in your get/read you could put the arrays "back together" into an array of objects and in your save method you would break you objects apart into synchronized arrays. In other words, I needed to convert an array into rows (one for each array element). You could expand the list into many rows, but this can lead to a jungle of rows that may be hard to keep track of. An example from documentation: CREATE FUNCTION sum(int[]) RETURNS int8 AS $$. STRING_AGG(car_id::character varying, ',') as car_id This results in a SQL query that looks like: The SQL specification requires row-wise comparison to return NULL if the result depends on comparing two NULL values or a NULL and a non-NULL. jsonb_array_elements_text expands the jsonb array into one row each element. 4 and higher, I would like to export some data (based on SELECT statement) as JSON array of arrays. json_row, json_row#>>'{stamp}' as stamp, json_row#>>'{date}' as date, json_row#>>'{img,0}' as img, On PG v9. Here id is id of a person and text is actually type of array. Use the [index] syntax to access the index element of an array. (The inputs must all have the same dimensionality, and cannot be empty or null. Update the array. from mytable t. Need to select a JSON array element dynamically from a PostgreSQL table; Original notes (outdated since pg 9. Here’s the basic syntax of the jsonb_array_elements() function: In this syntax, you specify a JSON array with a JSONB type that you want to expand its elements. 1 are available for arrays. Luckily, PostgreSQL offers the array data type which can be Dec 17, 2013 · Use an array constructor: SELECT ARRAY[Id::text, Code::text, Name::text] AS my_arr FROM tbl; We need a common type, of course. Subquery runs around 400-500ms, but wrapped in this json wrapper total time is 5 sec. Using a query along with the functions available in postgres such as string_to_array and string_agg, data from raw tables are converted to following results set. Sep 28, 2018 · I have a table in PostgreSQL, with two columns: id and nodes. {1,3,5,7,9} {2,4,6,8,10} (this is Postgres 8. -- in memory table sample. To check for overlap between two arrays: Jul 13, 2012 · This will return one column only, however the data type is not array. ka ek ex yh yg jw xm sy ed le