MySQL判断字符串是否是数字
SELECT * FROM **** WHERE trim(字段名) REGEXP '[^0-9]'=1
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...
让时间加一天,以及转换时间到INT数字格式UPDATE zbp_postSET log_CreateTime = UNIX_TIMESTAMP(DATE_ADD('2020-07-14 09:...
mysql> select CONCAT('My', 'S', 'QL');...
SELECT * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...
SELECT * from system_user LIMIT 60,20limit是设置分页的关键他可以控制数据输出偏移SELECT column_name,column_name FR...
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>...