1.6.2 MySQL Differences from Standard SQL

1.6.2.1 SELECT INTO TABLE Differences

1.6.2.2 UPDATE Differences

1.6.2.3 FOREIGN KEY Constraint Differences

1.6.2.4 '--' as the Start of a Comment

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:

• 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 13.7.1.8, “REVOKE Statement”.

• The CAST() function does not support cast to REAL or BIGINT. See Section 12.11, “Cast Functions and Operators”.