MySql 中文参考指南

1.7.2 MySQL Differences from Standard SQL

我们努力使 MySQL Server 遵循 ANSI SQL 标准和 ODBC SQL 标准，但在某些情况下，MySQL Server 以其他方式执行操作：

We try to make MySQL Server follow the ANSI SQL standard and the ODBC SQL standard, but MySQL Server performs operations differently in some cases:

  1. There are several differences between the MySQL and standard SQL privilege systems. For example, in MySQL, privileges for a table are not automatically revoked when you delete a table. You must explicitly issue a REVOKE statement to revoke privileges for a table. For more information, see Section 15.7.1.8, “REVOKE Statement”.

  2. The CAST() function does not support cast to REAL or BIGINT. See Section 14.10, “Cast Functions and Operators”.