mysql的字符串连接符
mysql> select CONCAT('My', 'S', 'QL');
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...
update 表名 SET log_Content = REPLACE(log_Content,'"upload','"/upload')...
mysql -h ***.***.***.*** -P 3306 -u root -pmysqldump -h ***.***.***.*** -P 3...
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>...
排名函数是SQL SERVER2005新增的函数。排名函数总共有四种,分别是:row_number、rank、 dense_rank 、ntile。row_number:顺序生成序号。rank:相同的...
1.date型转换成int型 UNIX_TIMESTAMP('2007-10-04 22:23:00') 2.int型转换成date型 FROM_UNIXTIME(97599...