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What is a set returning function?
A Set Returning Function is a PostgreSQL Stored Procedure that can be used as a relation: from a single call it returns an entire result set, much like a subquery or a table. It used to be possible to use SRF in the SELECT clause, with dubious (but useful at times) semantics, and also in scalar contexts.
How do I return multiple records in PostgreSQL?
CREATE OR REPLACE FUNCTION get_object_fields(name text) RETURNS RECORD AS $$ BEGIN — fetch fields f1, f2 and f3 from table t1 — fetch fields f4, f5 from table t2 — fetch fields f6, f7 and f8 from table t3 — return fields f1 …
What is return in Plsql?
The RETURN statement immediately completes the execution of a subprogram and returns control to the caller. Execution resumes with the statement following the subprogram call. In a function, the RETURN statement also sets the function identifier to the return value.
What is type in PostgreSQL?
Description. CREATE TYPE registers a new data type for use in the current database. The user who defines a type becomes its owner. If a schema name is given then the type is created in the specified schema. Otherwise it is created in the current schema.
Can we use return in procedure?
You can use one or more RETURN statements in a stored procedure. The RETURN statement can be used anywhere after the declaration blocks within the SQL-procedure-body. To return multiple output values, parameters can be used instead. Parameter values must be set prior to the RETURN statement being executed.
Which is the formula for the rows function?
The most basic formula used is =ROWS(rng). In the first reference, we used ROWS to get the number of columns from range B9:G19. We got the result as 11 as shown in the screenshot below: The function counted the number of rows and returned a numerical value as the result.
How to return the whole row in Excel?
Note: In the above formula, F2 is the lookup value you want to return the whole row based on, A2:D12 is the data range you want to use, 1,2,3,4 is the column number that you want to return its corresponding value.
What is the function to look up rows in Excel?
The function is used to look up and provide the number of rows in each reference or array. Thus, the function, after receiving an Excel range, will return the number of rows that are contained within that range.
When to use reference or row in Excel?
reference – [optional] A reference to a cell or range of cells. The ROW function returns the row number for a cell or range. For example, =ROW (C3) returns 3, since C3 is the third row in the spreadsheet. When no reference is provided, ROW returns the row number of the cell which contains the formula.