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This article mainly describes the three advanced usage of SELECT statements in the DB2 database. We all know that SELECT statements are important statements for database queries, this article mainly introduces the advanced usage of three different SELECT statements. The SELECT
Today we are going to discuss with you three advanced usage of SELECT statements in DB2 databases. We all know that SELECT statements are the most important statements in database queries, this article describes the advanced usage of the three SELECT statements. 1. Create a result table createtablenew_table_name
Recent project adjustments mainly involve changes to the length of database fields. In DB2, the only way to modify the length of a char field seems to be to delete the table and recreate it. Therefore, the question of which varchar and Char are used has been a headache. I read some information from the Internet and give a reply to this complicated question: SQL Server Performance Tuning for SQL Server developers [Http://www.databasejournal.com/feature
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