sql 判断数据库是否已存在
if exists(select * from master.dbo.sysdatabases where name = 's2723103005')
begin
drop database s2723103005
print '已删除数据库s2723103005'
end
create database s2723103005
on primary
(name=His_data,
filename = 'd:\database\his_data.mdf',
size=10,
maxsize = 1500,
filegrowth = 5
)
log on
(
name=His_log,
filename='d:\database\his_log.ldf',
size=5,
maxsize=500mb,
filegrowth = 5mb
)
相关文档：
using System.Data; // Use ADO.NET namespace
using System.Data.SqlClient;
SqlConnection thisConnection = new SqlConnection(
&nbs ......
SQL ODBC connection strings
Standard Security:< br> "Driver={SQLServer};Server=Your_Server_Name;Database=Your_Database_Name;Uid=Your_Username;Pwd=Your_Password;"
Trusted connection:< br> "Driver={SQLServer};Server=Your_Server_Name;Database=Your_Database_Name;Trusted_Connection=yes;"
......
declare @tb3 table (商品编号 nvarchar(10),批次号 nvarchar(10),库存数量 int,出库数量 int)
declare @tb1 table (商品编号 nvarchar(10),批次号 nvarchar(10),库存数量 int)
insert into @tb1 select '0001','090801',200
union all select '0001','090501',50
&n ......
写法一：
set xact_abort on
begin tran
DECLARE @SQL VARCHAR(99)
DECLARE CUR_FK CURSOR LOCAL FOR
SELECT 'alter table '+ OBJECT_NAME(FKEYID) + ' drop constraint ' + OBJECT_NAME(CONSTID) from SYSREFERENCES
--删除所有外键
OPEN CUR_FK
FETCH CUR_FK INTO @SQL
WHILE @@FETCH_STATUS =0
BEGIN
......
