rename column name in sql server

1. Add a new column to the existing table in the database Statement:altertable name add column name type Example:alter MyUser ADD Userdesc VARCHAR(+);2. Name the rename in the existing tables in the database Stateme

SQL Server obtains all column names in the temporary table or whether the specified column name exists. SQL Server column names Retrieve al

[UserName]' PRINT(@sql)EXEC(@sql)GO(iv) After SQL Server 2005, there is a dedicated pivot and UNPIVOT relational operator to do the conversion between rows and columns, the following is implemented in a static manner, the implementation of effect 4 is as follows:-- 3: Static pivot row to

[UserName]' PRINT(@sql)EXEC(@sql)GO(iv) After SQL Server 2005, there is a dedicated pivot and UNPIVOT relational operator to do the conversion between rows and columns, the following is implemented in a static manner, the implementation of effect 4 is as follows:-- 3: Static pivot row to

[Subject] from [Testrows2columns]) as a SELECT @sql = Left (@sql, LEN (@sql)-1) + ' from [Testrows2columns] GROUP by [UserName] ' PRINT (@sql) EXEC (@sql) GO (iv) After SQL

Label:SQL Server dynamic row to column (parameterized table name, grouping column, row to column field, field value)2014-05-26 16:09 by listening to the wind blowing rain, 26798 reading, 50 Reviews, Favorites, compilation I. What is covered in this article (Contents)

Label:CREATE TABLE Test(Department varchar (10),Customer varchar (10),Cost name varchar (10),Amount int)INSERT into test values (' A ', ' a ', ' phone fee ', 10)INSERT into test values (' A ', ' a ', ' run at public expense ', 11)INSERT into test values (' A ', ' a ', ' Bus fee ', 9)INSERT into test values (' A ', ' B ', ' phone fee ', 10)INSERT into test values (' A ', ' B ', ' public expense ', 10)INSERT into test values (' A ', ' C ', ' Bus fee ',

After the SQL Server clustered index is rebuilt, the column name of the change column location statistics information remains unchanged, It was originally found by using the clustered index primary key. It was confirmed that it was not a primary key issue but a clustered ind

Label:Originally found using the clustered index primary key, confirming that it is not a primary key problem, is a clustered index problem. Version:microsoft SQL Server R2 (SP1) -- Create a test table - drop table [testtable] Create table [dbo].[ TestTable] ( [id] [int] NOT NULL, [name] [varchar] (a) NOT null ) go -- insert data into insert [ TestTable] ([i

ConstraintName? 1 ALTER TABLE student DROP CONSTRAINT PK__student__2F36BC5B772B9A0B 10. Adding field constraints Format: ALTER TABLE tablename ADD constraint ConstraintName primary key (column_name) --Example 1? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 ALTER TABLE stuInfo ADD CONSTRAINT PK_stuNo PRIMARY KEY (stuNo) --示例2 添加主键约束（Primary Key）-- 存在主键约束PK_stuNO，则删除 IF EXISTS(SELECT * FROM sysobjects WHERE

xtype= ' PK ') Alter TABLE stuinfo Drop Constraint Pk_stuno Go--Re-add PRIMARY KEY constraint Pk_stuno ALTER TABLE stuinfo add CONSTRAINT pk_stuno PRIMARY key (Stuno) Go--Example 3 adds a unique UQ constraint (unique CONSTRAINT)--exists only A constraint Uq_stuno, delete the IF EXISTS (SELECT * from sysobjects WHERE name= ' uq_stuid ' and xtype= ' UQ ') Alter TABLE stuinfo Drop Constra int Uq_stuid Go--re-add unique constraint uq_stuid ALTER TABLE st

Rename the column name and table name in oracle directly in pl/SQL and then in oem, however, you may not be able to change the lower-case table name to the upper-case table name. At thi

A. rename a table Rename the table oldtablename to newtablename: Exec sp_rename 'oldtablename', 'newtablename' B. rename a columnRename the column oldname in table 1 to newname.Exec sp_rename 'table1. oldname', 'newname', 'column' Note: Table 1 is not added before newn

Rename column name in MongoDB (change field name)Category: Database 2012-06-11 11:071648 people read comments (0) favorite reports Mongodbshell2010cTransferred from: HTTP://HI.BAIDU.COM/YOUHONG2010/ITEM/6BB2F020115394846E2CC3B6See also: Http://www.mongodb.org/display/DOCS/Updating#Updating-%24renameCases:Shell Code

Tags: --sql Server 2005, or 2012:select * from Information_schema.tables--sql server 2000:select * from sysobjects WHERE xt ype= ' u ' select * from sysobjects WHERE xtype= ' u ' select table_name from GEOVIDNU. Information_schema. Tablesselect sobjects.namefrom sysobjects sobjectswhere sobjects.xtype = ' U ' EXEC sp_

When querying vouchers and approving vouchers, "column prefix tempdb. Invalid: No table name specified" error prompt, how to solve? Reason: Because SQL2000 cannot recognize special characters such as "-", "," and "Chinese" in the computer name, only English letters and numbers can be used. Resolution: Right key to My Computer "properties" in "Computer

Original: MS SQL Server searches for the column name of a table's primary keySELECT syscolumns. Name from syscolumns,SYSOBJECTS,sysindexes,SysindexkeysWHERE syscolumns. ID =object_id(' tab_xxx ')--syscolumns.id The Table object ID that the

A few days ago, my colleague asked me how to convert a field value to a column. I wrote a simple Demo to share it. The Code is as follows: -- create a test table and add Test Data createtable # temp (amoney, bvarchar (10) * insertinto # temp (a, B) values () insert A few days ago, a colleague asked me how to convert a field value to a column. I wrote a simple Demo to share it. The Code is as follows: -- cre

Select Syscolumns . Name From Syscolumns , Sysobjects , Sysindexes , Sysindexkeys Where Syscolumns . ID = Object_id ( 'Tab _ XXX' ) -- Syscolumns. ID is the table Object ID of the column. And Sysobjects . Xtype = 'Pk' -- Sysobjects. xtype object type And Sysobjects . Parent_obj = Syscolumns . IDAnd Sysindexes . ID = Syscolumns . IDAnd Sysobjects . Name

, Syscolumns. isnullable, syscolumns. LengthFrom syscolumns, policypes where syscolumns. xusertype = policypes. xusertype and "syscolumns. ID = object_id (''tablename '')Note:(A) In order to highlight some important content, several pieces of information are selected for output.(B) The syscolumns table only contains data type numbers. To obtain the complete name, you need to find it from the categorypes table. Generally, it is better to use xusertype