postgresql type cast

Wiki. openbravo. comwikiERP2.50Developers _ GuideConceptsDBPL-SQL_code_rules_to_write_Oracle_and_Postgresql_codeProcedureLanguagerulesOpenbravoERPsupportsOracleandPostgreSQLdatabaseengines.Thisisasetofrecommendat Http://wiki.openbravo.com/wiki/ERP/2.

This article mainly introduces some similarities between DB2 database development and PostgreSQL development in actual operations. What's more, I recently used DB2 databases and wrote some differences between them. Not necessarily true. But you can

From accidentally climbing the blog PostgreSQL is a powerful open-source relational database system. after more than 15 years of development, it has won an excellent reputation in terms of reliability, data integrity, and correctness. it runs on all

The SQL input consists of a series of commands . An order consists of a series of tokens , with a semicolon (";") End. The termination of the input stream also ends a command. Which tokens are valid depends on the syntax of the particular command.A

First, the summaryThe current project was originally based on Oracle development and is now being ported to PostgreSQL. Given that JPA has been used to achieve object persistence, the leader has always thought that the migration task is easy, but

Document directory Supported Data Types   PostgreSQL is a widely used free and open source database. Compared with MySQL, PostgreSQL is more suitable for complicated enterprise computing tasks. MySQL is more widely used in the Internet field,

1.createdb database nameGenerate Database2.DROPDB database nameDeleting a database3.CREATE User NameCreate user4.drop User NameDelete User5.SELECT usename from Pg_user;View System User Information\du7.SELECT version ();View version Information8.psql

PostgreSQL tutorial (5): Functions and operators (1), postgresql Operators I. logical operators: Common logical operators include AND, OR, and not. Its semantics is exactly the same as that of logical operators in other programming languages. Ii.

PostgreSQL Create a databaseTo create a Xifenfei library using the shell-level createdb command-bash-3.2$ Createdb XifenfeiSystem Authentication Login PostgreSQL DatabaseUsing the Xifenfei database in the psql login PostgreSQL-bash-3.2$ Psql

4.2. Value expressionsValue expressions are used in a variety of syntax environments, such as in the target list of the SELECT command, as new column values in INSERT or UPDATE , or in search conditions for many commands. We sometimes call the