文件名称:SQL 语句快速参考
文件大小:49KB
文件格式:DOC
更新时间:2012-11-02 10:30:04
SQL 语句快速参考
SQL 语句快速参考 AND / OR SELECT column_name(s) FROM table_name WHERE condition AND|OR condition ALTER TABLE (add column) ALTER TABLE table_name ADD column_name datatype ALTER TABLE (drop column) ALTER TABLE table_name DROP COLUMN column_name AS (alias for column) SELECT column_name AS column_alias FROM table_name AS (alias for table) SELECT column_name FROM table_name AS table_alias