SELECT 查询语句
SELECT col_name,... FROM table_name WHERE where_condition GROUP BY col_name,... HAVING where_condition ORDER BY col_name,... LIMIT offset,row_count
INSERT 插入语句
INSERT INTO table_name(col_name,...) values(expr,...)
UPDATE 更新语句
UPDATE table_name SET col_name=expr,... WHERE where_condition
DELETE 删除语句
DELETE FROM table_name WHERE where_condition
REPLACE INTO 插入数据 如果已存在则删除旧数据插入新数据
REPLACE INTO table_name(col_name,...) values(expr,...)
作者：liuawei
链接：https://www.jianshu.com/p/9b65a754c425