My SQL获取某个表的列名 DESC TableName SHOW COLUMNS FROM TableName SELECT COLUMN_NAME  FROM information_schema.columns WHERE table_name='tablename'…

SELECT b.name as 字段名 ,Type_name(b.xusertype) as 字段类型, Isnull(c.VALUE,'') as 字段说明FROM sysobjects a join syscolumns b on a.id = b.id JOIN sys.extended_properties c ON b.id = c.major_id AND b.colid = c.minor_id WHERE a.id = Object_id('gbpm.JLFFORM3') --…

方法1:[仅指定表名] select COLUMN_NAME from information_schema.COLUMNS where table_name = 'your-table-name'; 方法2:[指定表名+数据库名] select COLUMN_NAME from information_schema.COLUMNS where table_name = 'your-table-name' and table_schema = 'your-DB-name'; ==========…

SELECT syscolumns.name,systypes.name,syscolumns.isnullable,syscolumns.length FROM syscolumns, systypes WHERE syscolumns.xusertype = systypes.xusertype AND syscolumns.id = object_id('ChildrenCustomer') and syscolumns.name like '%obile'…

#3. 操作文件中的内容/记录 往哪张表去插入 insert into 表名指定字段(id,name) 插入要加values(针对前面字段插入)(2,mike); insert into t1(id,name) values(2,'mike'); insert into t1 values(1,'egon1'); 也可以用逗号隔开 同时插入多条记录 insert into t1(id,name) values(1,'egon1'),(2,'egon2'),(3,'egon3'); 如果默认不写…

创建表结果和数据准备[直接执行即可] /* Navicat MySQL Data Transfer Source Server : ftl1012 Source Server Version : 50617 Source Host : localhost:3306 Source Database : test_python Target Server Type : MYSQL Target Server Version : 50617 File Encoding : 65001 Date: 20…

常用的sql语句如下,应对工作足以 1.查询指定字段 select c_id,c_age,c_name from t_student; select c_id as 编号,c_name as 姓名,c_age 性别 from t_student; 2.去重查询 select distinct c_address from t_student select distinct c_address,c_name from t_student 3.比较运算符查询 select c_name,c_gend…

#2. 操作文件 先切换到文件夹下:use db1 查看当前所在的数据库 mysql> select database(); +------------+ | database() | +------------+ | db1 | +------------+ row in set (0.00 sec) 每创建一个表每个字段都有相应类型int 整数类型char 字符类型 增:create table t1(id int,name char); 创建的数据库都在 在 /var/lib/mysql目…

常用sql操作如下: 1.查看当前数据库的所有表 show tables; 2.创建表 create table stu(sid int,sname char(20),sage int default 20 ); 3.查看表的创建信息 show create table stu; 4.查看表的字段信息 desc stu; 5.添加字段 alter table stu add gender char(4); 6.删除字段 alter table stu drop gender; 7.修改某个字段的…

简而言之 CREATE DATABASE xx CHARACTER SET utf8 COLLATE utf8_general_ci; USE xx; ),qname ) ) ) ) )); ) ,total ) ,corret ) ); ),stdin ) ) )); 在数据库后 + 数据表的相应段 最后加上 CHARACTER SET utf8 COLLATE utf8_general_ci 即可 与网页交互的时候,需要设置网页的编码为utf-8,request交互的字符编码也为 utf-8…