你如何返回表的列名？

Question

How would I return the column names of a table using SQL Server 2008? ie a table contains these columns- id, name, address, country and I want to return these as data.

Answer 1

Not sure if there is an easier way in 2008 version.

USE [Database Name]
SELECT COLUMN_NAME,* 
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'YourTableName' AND TABLE_SCHEMA='YourSchemaName'

Answer 2

这是最简单的方法

exec sp_columns [tablename]

Answer 3

像这样的东西？

sp_columns @table_name=your table name

Answer 4

One method is to query syscolumns:

select
   syscolumns.name as [Column],
   syscolumns.xusertype as [Type],
   sysobjects.xtype as [Objtype]
from 
   sysobjects 
inner join 
   syscolumns on sysobjects.id = syscolumns.id
where sysobjects.xtype = 'u'
and   sysobjects.name = 'MyTableName'
order by syscolumns.name

Answer 5

This seems a bit easier then the above suggestions because it uses the OBJECT_ID() function to locate the table's id. Any column with that id is part of the table.

SELECT * 
  FROM syscolumns 
 WHERE id=OBJECT_ID('YOUR_TABLE') 

I commonly use a similar query to see if a column I know is part of a newer version is present. It is the same query with the addition of {AND name='YOUR_COLUMN'} to the where clause.

IF EXISTS (
        SELECT * 
          FROM syscolumns 
         WHERE id=OBJECT_ID('YOUR_TABLE') 
           AND name='YOUR_COLUMN'
        )
BEGIN
    PRINT 'Column found'
END

Answer 6

try this

select * from <tablename> where 1=2

...............................................

Answer 7

The following seems to be like the first suggested query above but sometime you have to specify the database to get it to work. Note that the query should also work without specifying the TABLE_SCHEMA:

SELECT COLUMN_NAME
FROM   YOUR_DB_NAME.INFORMATION_SCHEMA.COLUMNS
WHERE  TABLE_NAME = 'YOUR_TABLE_NAME' AND TABLE_SCHEMA = 'YOUR_DB_NAME'

Answer 8

I use

SELECT st.NAME, sc.NAME, sc.system_type_id
FROM sys.tables st
INNER JOIN sys.columns sc ON st.object_id = sc.object_id
WHERE st.name LIKE '%Tablename%'

Answer 9

Why not just try this:

right click on the table -> Script Table As -> Create To -> New Query Editor Window?

The entire list of columns are given in the script. Copy it and use the fields as necessary.

Answer 10

USE[Database] SELECT TABLE_NAME,TABLE_SCHEMA,[Column_Name],[Data_type] FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA='dbo'

Answer 11

While @Gulzar Nazim's answer is great, it is probably easier to include the database name in the query, which could be achieved by the following SQL.

SELECT COLUMN_NAME, *
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'you-table-name' AND TABLE_CATALOG='your-database-name'

Answer 12

You can use the below code to print all column names; You can also modify the code to print other details in whichever format u like

    declare @Result varchar(max)='
            '
            select @Result=@Result+''+ColumnName+'
            '
            from
            (
                select
                    replace(col.name, ' ', '_') ColumnName,
                    column_id ColumnId
                from sys.columns col
                    join sys.types typ on
                        col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id
                where object_id = object_id('tblPracticeTestSections')
            ) t
            order by ColumnId
            print @Result

Output

column1
column2
column3
column4

To use the same code to print the table and its column name as C# class use the below code:

    declare @TableName sysname = '<EnterTableName>'
    declare @Result varchar(max) = 'public class ' + @TableName + '
    {'

    select @Result = @Result + '
        public static string ' + ColumnName + ' { get { return "'+ColumnName+'"; } }
    '
    from
    (
        select
            replace(col.name, ' ', '_') ColumnName,
            column_id ColumnId
        from sys.columns col
            join sys.types typ on
                col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id
        where object_id = object_id(@TableName)
    ) t
    order by ColumnId

    set @Result = @Result  + '
    }'

    print @Result

Output:

 public class tblPracticeTestSections
 {
   public static string column1 { get { return "column1"; } }

   public static string column2{ get { return "column2"; } }

   public static string column3{ get { return "column3"; } }

   public static string column4{ get { return "column4"; } }

 } 

Answer 13

I'm not sure if the syscolumns.colid value is the same as the 'ORDINAL_POSITION' value returned as part of sp_columns, but in what follows I am using it that way - hope I'm not misinforming...

Here's a slight variation on some of the other answers I've found - I use this because the 'position' or order of the column in the table is important in my application - I basically need to know 'What is column (n) called?'

sp_columns returns a whole bunch of extraneous stuff, and I'm handier with a select than T-SQL functions, so I went this route:

select    
  syscolumns.name, 
  syscolumns.colid    
from     
  sysobjects, syscolumns  
where 
  sysobjects.id = syscolumns.id and   
  sysobjects.xtype = 'u' and   
  sysobjects.name = '<YOUR_TABLE>' 
order by syscolumns.colid 

Answer 14

CREATE PROCEDURE [dbo].[Usp_GetColumnName]      
        @TableName varchar(50)
AS
BEGIN   
    BEGIN
        SET NOCOUNT ON
        IF (@TableName IS NOT NULL) 
            select ORDINAL_POSITION OrderPosition,COLUMN_NAME ColumnName from information_schema.columns 
             where table_name =@TableName
             order by ORDINAL_POSITION
    END
END

Answer 15

I just use a query like Martin Smith mentioned, just little shorter:

SELECT COLUMN_NAME 
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'YourTableName'

Answer 16

SELECT *
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = N'TableName'

Answer 17

Since SysColumns is deprecated , use Sys.All_Columns :

Select  
 ObjectName       = Object_Name(Object_ID)  
,T.Name  
,C.*  
,T.*  
From   
           Sys.All_Columns C  
Inner Join Sys.Types       T  On T.User_Type_Id = C.User_Type_Id  
Where [Object_ID] = Object_ID('Sys.Server_Permissions')  
--Order By Name Asc  

Select * From Sys.Types will yield user_type_id = ID of the type. This is unique within the database. For system data types: user_type_id = system_type_id .

Answer 18

DECLARE @col NVARCHAR(MAX);
SELECT @col= COALESCE(@col, '') + ',' + COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS WHERE  Table_name = 'MxLocations';
SELECT @col;

Answer 19

IF you are working with postgresql there is a possibility that more than one schema may have table with same name in that case apply the below query

SELECT column_name, data_type 
FROM information_schema.columns
WHERE table_name = 'your_table_name' AND table_schema = 'your_schema_name’;

Answer 20

set fmtonly on
select * from yourTable