SQL is a database established specifically for the operation command set is a fully functional database language.

SQL是专为数据库而建立的操作命令集，是一种功能齐全的数据库语言。

youdao

SQL is a database established specifically for the operation command set is a fully functional database language.

SQL是专为数据库而建立的操作命令集，是一种功能齐全的数据库语言。

youdao