kingzhexian的专栏

 use mastergoif DB_ID(ProductSet) is not null --判断指定的数据库是否存在   drop database ProductSetgocreate database ProductSetgouse ProductSetgocreate table UserLogin --用户表(UserID varchar(10) constraint PK_Use

 查询 card 的记录为两次以上的 card，记录数:select count(card), card from TableName group by card having count(card) > 1级联更新，级联删除:ColumnName type not null constraint FK_Name foreign key(ColumnName) references Prima

namespace ImageSQL{    partial class FormImageSQL    {        private System.ComponentModel.IContainer components = null;        protected override void Dispose(bool disposing)        {            i

use mastergoif DB_ID(UserImage) is not null   drop database UserImagecreate database UserImagegouse UserImagegocreate table Images( Image_Name nvarchar(255) primary key, Image_Data Image not null)go

using System;using System.Runtime.InteropServices;using System.Threading;using System.Windows.Forms;using Microsoft.Win32;namespace ImageSQL{    static class Program    {        #region DllImportAtt

USE AdventureWorks;GOWITH OrderedOrders AS(SELECT SalesOrderID, OrderDate,ROW_NUMBER() OVER (order by OrderDate)as RowNumberFROM Sales.SalesOrderHeader ) SELECT * FROM OrderedOrders WHERE RowNumber be