四、SQL的组成(分类) DATABASE TABLE CREATE VIEW INDEX SQL DDL: ALTER DROP SQL QUERY: SELECT∴FROM∴ INSERT SQL SQL DML: UPDATE DELETE GRANT SQL DCL: REVOKE AUDIT 嵌入式SQL:四、SQL的组成(分类) DATABASE TABLE CREATE VIEW INDEX SQL DDL: ALTER DROP SQL QUERY:SELECT … FROM … INSERT … SQL SQL DML: UPDATE … DELETE … GRANT SQL DCL: REVOKE AUDIT 嵌入式SQL: