1.建表 1 IF object_id (N'表名', N'U') IS NULL CREATE TABLE 表名 ( 2 id INT IDENTITY (1, 1) PRIMARY KEY ,......); 2.查询所有满足条件的表 1 SELECT 2 NAME 3 FROM 4 sys.objects 5 WHERE 6 type = 'u' 7 AND NAME LIKE 'test_%'; 3.批量删除满足条件的表 1 DECLARE 2 @NAME VARCHAR (…
对于MySQL的复制相同表结构方法,有create table as 和create table like 两种,区别是什么呢? ? 1 create table t2 as select * from t1 where 1=2; 或者 limit 0; as创建出来的t2表(新表)缺少t1表(源表)的索引信息,只有表结构相同,没有索引. ? 1 create table t2 like t1 ; like 创建出来的新表包含源表的完整表结构和索引信息. 二者的用途: as用来创建相同表结构并复…
ERROR 1005: Can't create table (errno: 121) errno 121 means a duplicate key error. Probably the table already exists in the InnoDB internal data dictionary, though the .frm file for the table has been deleted. This is themost common reason for gettin…
2015-08-27 php大力力023.CREATE TABLE创建新表sql写字段备注 http://www.cnblogs.com/dalitongxue/p/4762182.html 参考: MySQL字段的说明和备注信息 http://blog.csdn.net/chelen_jak/article/details/45689139 DROP TABLE IF EXISTS test_table; CREATE TABLE test_table( Test_ID int NOT NUL…
CREATE TABLE `user` (`id` bigint(32) NOT NULL AUTO_INCREMENT ,`name` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,`erp` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '' ,`email` varchar(32) CHARACTER SET…
Disable SHOW CREATE TABLE and SHOW COLUMNS in Yii为啥会显示:SHOW CREATE TABLE and SHOW COLUMNS 答案:This is how ActiveRecord retrieves the schema to power it's attributes. Since AR public properties are fetched from DB each time while using the model, this…
Insert是T-sql中常用语句,Insert INTO table(field1,field2,...) values(value1,value2,...)这种形式的在应用程序开发中必不可少.但我们在开发.测试过程中,经常会遇到需要表复制的情况,如将一个table1的数据的部分字段复制到table2中,或者将整个table1复制到table2中,这时候我们就要使用SELECT INTO 和 INSERT INTO SELECT(sqlserver)/ create table as se…