As explained above, the expression in such a statement is evaluated by means of an SQL SELECT command sent to the main database engine. The expression must yield a single value. If the expression's ...

page_description This tutorial explains you the block structure of PL/pgSQL and shows you step by step how to develop anonymous blocks. PL/pgSQL's block structure ...

In this section and the following ones, we describe all the statement types that are explicitly understood by PL/pgSQL. Anything not recognized as one of these statement types is presumed to be an SQL ...