How does the JSON support function in PostgreSQL work?
JSON Support Functions Returns the array as JSON. A PostgreSQL multidimensional array becomes a JSON array of arrays. Line feeds will be added between dimension 1 elements if pretty_bool is true. Returns the row as JSON. Line feeds will be added between level 1 elements if pretty_bool is true.
When to use the cast function in PostgreSQL?
Returns the row as JSON. Line feeds will be added between level 1 elements if pretty_bool is true. Returns the value as JSON. If the data type is not built in, and there is a cast from the type to json , the cast function will be used to perform the conversion.
Which is an example of an array to JSON function?
Example Example Result; array_to_json(anyarray [, pretty_bool]) json: Returns the array as JSON. A PostgreSQL multidimensional array becomes a JSON array of arrays. Line feeds will be added between dimension 1 elements if pretty_bool is true. array_to_json(‘{{1,5},{99,100}}’::int[]) [[1,5],[99,100]] row_to_json(record [, pretty_bool]) json
Which is the most supported version of PostgreSQL?
Supported Versions: Current ( 13 ) / 12 / 11 / 10 / 9.6 Unsupported versions: 9.5 / 9.4 / 9.3 / 9.2 This documentation is for an unsupported version of PostgreSQL. You may want to view the same page for the current version, or one of the other supported versions listed above instead. Chapter 9. Functions and Operators 9.15.
How does an aggregate function work in PostgreSQL?
Unlike most built-in aggregates, these aggregates are not strict, that is they do not drop input rows containing nulls. Null values sort according to the rule specified in the ORDER BY clause. Table 9-53. Grouping Operations GROUPING (args…)
How are aggregate functions associated with window functions?
Each of the aggregates listed in Table 9-52 is associated with a window function of the same name defined in Section 9.21.