<?php$top = 1;function getTop() {global $top;$top ++;return $top;}?>调用 <?=getTop()?><!-- return $top; 输出1开始 return $top-1; 输出0开始-->
DELETE FROM `nmgqqnew(数据库名称)`.`phome_ecms_news_data_1(表名称)` WHERE `id(删除查找字段)` = 7222(查找ID号)
update PE_Article set Content=REPLACE ( cast(Content as nvarchar(MAX)),'原内容','') where Content like '%最新替换内容%'
5,mysql查询文章字数SELECT COUNT(*) FROM phome_ecms_news_data_1 6,MYSQL获取字段汉字的字数SELECT *,CHAR_LENGTH(newstext) FROM phome_ecms_news_data_1 7,查看最大连接数show variables like '%max_connection%'; 获取字段总数(代码和标签符
查询一个数据库中的所有表和所有字段、字段类型及注释等信息SELECT TABLE_NAME, column_name, DATA_TYPE, column_comment FROM information_schema.COLUMNSWHERE TABLE_SCHEMA = '数据库名' ;
SELECT COUNT(column_name) FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = '数据库名';
查询一个数据库中有多少张表SELECT COUNT(*) TABLES, table_schema FROM information_schema.TABLES WHERE table_schema = '数据库名' GROUP BY table_schema;
查询一个表中有多少个字段SELECT COUNT(*) FROM information_schema. COLUMNS WHERE table_schema = '数据库名' AND table_name = '表名';
帝国CMS让信息内容ID从1开始的方法!,清洗所有文章id重新开始就第一次安装一样。慎用,需要备份呢自己内容否则丢失本站不负责,TRUNCATE `[!db.pre!]ecms_news`;TRUNCATE `[!db.pre!]ecms_news_check`;TRUNCATE `[!db.pre!]ecms_news_check_data`;TRUNCATE `[!
mysql替换字段更换UPDATE `数据库表`SET `字段` = REPLACE(`字段`, '被替换内容', '替换内容')