update column from another table sql

SQL SERVER Determines if there is a database, table, column, view--1. Determine if the database existsIF EXISTS(SELECT * fromSYS. DATABASESWHERENAME= 'Database name') DROP DATABASE [Database name] --2. Determine if a table existsIF EXISTS(SELECT * fromSYSOBJECTSWHEREId= object_id(N'[

Environment: SQL Server 2008 R2 Problem: Modifying table column names Solve: Modify the table's column name in SQL Server to invoke the stored procedure sp_rename. Use test;--using the database sp_rename ' D_s_t.avg_grade ', ' avg_g ', '

A method of SQL Update multi-table joint updating You can modify the field values of one table and the other table associations based on the values of one table's fields, like an associated queryUpdate table one set

Original: SQL Server determines if there is a database, table, column, view1 determining whether a database existsif exists (SELECT * from sys.databases WHERE name = ' database name ')drop database [DB name]2 Determining whether a table existsif exists (select * from sysobjects where id = object_id (n ' [

Label: About the "Unable to create a linked server"(NULL)"This error may be reported when the OLE DB provider SQL Server 2008 reads Excel data: Unable to create linked server"(NULL)"The OLE DB Access interface"MSDASC"the instance. 1This error occurs primarily when reading data with code: INSERT into database table nameSelect* fromOpenDataSource ('microsoft.ace.oledb.12.0','Data source= "d:\Excel

deal with them now:The first step is to add the field GUID to the new table and prepare the associated data.ALTER TABLE dbo. TABLE Add GUID char (38)ALTER TABLE dbo. Table_sub Add GUID char (38)The GUID in the table_sub is the old_table_sub old_table_guid);Everyone should have understood it.The second step is to copy

1. Create a test tableCreate table t_user (ID int identity primary key,UserID varchar (50) not null,UserName varchar (50) null,DeptID int not null,Phone varchar (50) null,Fax varchar (50) null) Create table t_dept (ID int identity primary key,DeptName varchar (50) null,Phone varchar (50) null,Fax varchar (50) null) INSERT t_userSelect n '001', N 'zhang san', 1, N '000000', N '000000'UNIONAll select n '002 '

Label: In our development process, it is unavoidable to encounter a scene, the value of a column in a table is stitched into a comma-separated row of data We're stitching up the UserID column into a row of data -------》 So I wrote a stored procedure to solve this kind of problem. --AUTHOR:LHM--Create date:2015-01-15 --Description: A

Product (pid, name, amount, nowAmount): ID, name, existing quantity, current quantityTrade (id, pid, operType, number): identifier, product identifier, operation type (warehouse receiving: 1, warehouse picking: 0), quantity Test data in the Product table: 1 Apple 100 0 2 Orange 50 0 Test data in the Trade table: 1 1 1 432 2 1 0 50

Tags: ring using har cell storage traints Batch ref ACERecently modified the database table structure, the data synchronization problem, found that a lot of data has been modified, but filtered through the view or the original data, so suspect should be the view cache data, in the garden to find the following blog post, here to make a record memo. original link:http://www.cnblogs.com/yashen/archive/2004/12/23/81000.html This is often the case when w

SQL statement query table name/column name/primary key/Auto grow value in database ----A table created by a user in a query database ----JSJ01 as database name Select name tablename from JSJ01. sysobjects where type= ' U ' and name not in (' dtproperties ') --field information in the query

To determine whether a table exists:Grammar:SELECT * FROM dbo. SysObjects WHERE id = object_id (N ' table name ') Example:SELECT * FROM dbo. SysObjects WHERE id = object_id (N ' Exchangelog ')if exists (SELECT * FROM dbo. SysObjects WHERE id = object_id (N ' Exchangelog ')) print ' table exists ' else print ' table