plpgsql for

PL/pgsql (Procedural Language/PostgreSQL Structured Query Language) implements PostgreSQL ordbms when there are too many other statements. The syntax of Oracle Database contains PL/SQL statements, which is similar to linear regression.   More

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Today, a netizen asked PostgreSQL 9.0 how to debug functions in the group. I remember there was a plug-in named edb-debugger in 8.3 that could be used. there is no 9.0 database at hand, so I tested it and it could not be used at 9.1. The result is

Http://www.postgresonline.com/journal/archives/201-Using-RETURNS-TABLE-vs.-OUT-parameters.html--http://www.postgresonline.com/journal/archives/201-using-returns-table-vs.-out-parameters.html--ver:9.3 Geovin Du Tu--returning a single record using SQL

1. The following Code creates a top100cur () function, which returns an anonymous cursor. -- Drop function top100cur (); Create Function top100cur () returns refcursor as $ declare ABC refcursor; beginopen ABC for select * From person limit 100;

Recently in the study of PostgreSQL, so also has a strong interest in pl/pgsql, so here is a little summary, first of all, this PL is procedure language shorthand, that is, the so-called "process language." A large part of the following is quoted

1. Return statementThere are three commands that can be used to return data from a function: RETURN RETURN NEXT RETURN QUERY 2. Return command syntax:RETURN RETURN expression;If you do not use the expression return command to

Symfoware Open System"DDL" (data definition Language)A data definition language that defines and manages the language of all objects in a SQL database. The main commands are create, alter, DROP, etc., the DDL is mainly used in the initialization of

PostgreSQL, like most databases, logically divides the attribution of objects through schemas, as shown in the graph. Because of the concept of schema, when accessing objects in a database, we need to specify which schema is underneath.

  Author: icyriverSource: http://icyriver.net /? P = 176     PL/ProxyAndPostgreSQLThe structure relationship of the cluster can be clearly expressed. If you are not familiar with pL/proxy and PostgreSQL clusters, you can seeSkype plans for