统计mysql字段值的长度
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>3;
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>3;
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...
mysql -h ***.***.***.*** -P 3306 -u root -pmysqldump -h ***.***.***.*** -P 3...
in 或者out 参数 :需要设定长度,否则保存的时候会报错;参数和字段名重名的时候,为了区别字段名,需要在字段前面加入表名创建临时表CREATE TEMPORARY TABLE&...
SELECT * FROM **** WHERE trim(字段名) REGEXP '[^0-9]'=1...
update 表名 SET log_Content = REPLACE(log_Content,'"upload','"/upload')...
SELECT * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...