SQL Server

1: The following is a simple query method. It is calculated based on the time difference between the query time and the query time. Copy codeThe Code is as follows:Declare @ begin_date datetimeDeclare @ end_date datetimeSelect @ begin_date = getdate

In actual use, how can we flexibly use them in the stored procedure? Although they implement the same functions, in a stored procedure, how does one sometimes use temporary tables instead of table variables, and sometimes use table variables instead

Software used: MySQLMigrationToolThe system prompts that the data is too large to be imported. Modify the max_allowed_packet of the my. cnf file to be greater than MB. In windows, my. cnf may not be displayed. You need to enter the address: drive

The following describes how to delete duplicate records.There are two Repeated Records. One is a completely repeated record, that is, records with all fields being repeated, and the other is records with duplicate key fields, such as duplicate Name

One day, when I debugged the program, I suddenly found that the following error was returned when I wanted to add a relational table after I attached the database:The database does not have a valid owner, so you cannot install the database

"Insite mail" is different from email, which is sent and saved by a dedicated email server. The "insite message" is a message in the system. To put it bluntly, the "insite message" is implemented by inserting records in the database. "Insite email"

Changing the vast majority of SQL queries to stored procedures can undoubtedly improve some performance.All operations that use "select * from xxx" are specific to the required fields.Join is used to connect more than two tables with a large amount

Copy codeThe Code is as follows:If exists (select * from dbo. sysobjects where id = object_id (n' [dbo]. [f_getdate] ') and xtype in (n'fn', n'if', n'tf '))Drop function [dbo]. [f_getdate]GOCreate function [dbo]. [f_getdate](@ Year int, -- the year

Copy codeThe Code is as follows:-- Merge duplicate rowsSelect * fromUnionSelect * from B-- Duplicate rows are not merged.Select * fromUnion allSelect * from BSort by a Field-- Merge duplicate rowsSelect *From (Select * fromUnionSelect * from B) AS

Copy codeThe Code is as follows:Create table RSSFeedRight(FeedId int Foreign Key (FeedId) References RSSFeed (FeedId) not null, -- FeedId,UserId int Foreign Key (UserId) References UserInfo (UserId) not null, -- UserId,RightValue bigint not null

First, get the total number of data rowsCopy codeThe Code is as follows:Set ANSI_NULLS ONSet QUOTED_IDENTIFIER ONGoAlter procedure [sq8reyoung]. [fenye_num](@ TableNames NVARCHAR (200 ),@ Filter nvarchar (200 ))ASIF @ Filter =''SET @ Filter = 'where

I. Problem description: 1. In SQL Server, the ntext/text/image field cannot be replaced by the replace function;2. By convert field conversion, you can convert the ntext field to varchar (8000) and replace it with the Relpace function. However, this

Database Table A has 100,000 records, and the query speed is normal. However, after importing one thousand data records, the problem occurs. When the selected data is between the original 100,000 records, the speed is still quite fast; but when the

Method 1: On the input CD-KEY (serial number) page, enter the CD-KEY (serial number) of windows server 2003 that you have installed.The CD-KEY (serial number) of 2000 ).CD-KEY (serial number) for Windows server 2003:

SQL Server backup is a system project that takes a lot of time. As the database continues to grow during running, the corresponding backup will take more time. Generally, a database of GB is regarded as a very large database. Today, 100gb is very

1. SQL server 2005's performance tools include SQL Server Profiler and database engine optimization consultant. Excellent Dongdong and must be used skillfully.2. When querying SQL statements, enable "show estimated execution plans" to analyze the

For SQL SERVER 2000 and earlier versions, you must use an auto-incrementing column and a temporary table.Copy codeThe Code is as follows:SELECT [AUTOID] = IDENTITY (int, 1, 1), * INTO # temp_table FROM table name;Copy codeThe Code is as

Copy codeThe Code is as follows:IF Exists (Select 1 From sysobjects Where Name = 'SP _ search' And xType = 'P ')Drop Procedure sp_searchGo/*General Stored Procedure of fuzzy queryCreate by sxm, date 2009-7-14Parameters:@ Table_name table name@

Copy codeThe Code is as follows:-- Row-to-column Conversion-- Establish a runtime environmentCreate Table TEST(DATES Varchar (6 ),EMPNO Varchar (5 ),STYPE Varchar (1 ),AMOUNT Int)-- Insert data recordsInsert TEST Select '200', '200', 'A', 5Union All

-- Use the program block--> Title: generate a sequence number.--> Author: wufeng4552--> Date: 13:40:59Declare @ s varchar (8000)Set @ s = lower (@ version)Select @ s/*Microsoft SQL server 2005-9.00.4035.00 (intel x86)Nov 24 2008 13:01:59Copyright (c)