Create table (structure) from existing table

How to create new table which structure should be same as another table

I tried

CREATE TABLE dom AS SELECT * FROM dom1 WHERE 1=2

but its not working error occurred

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最佳答案

Try:

Select * Into <DestinationTableName> From <SourceTableName> Where 1 = 2

Note that this will not copy indexes, keys, etc.

If you want to copy the entire structure, you need to generate a Create Script of the table. You can use that script to create a new table with the same structure. You can then also dump the data into the new table if you need to.

If you are using Enterprise Manager, just right-click the table and select copy to generate a Create Script.

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SELECT *
INTO NewTable
FROM OldTable
WHERE 1 = 2
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I don't know why you want to do that, but try:

SELECT *
INTO NewTable
FROM OldTable
WHERE 1 = 2

It should work.

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Found here what I was looking for. Helped me recall what I used 3-4 years back.

I wanted to reuse the same syntax to be able to create table with data resulting from the join of a table.

Came up with below query after a few attempts.

SELECT a.*
INTO   DetailsArchive
FROM   (SELECT d.*
FROM   details AS d
INNER JOIN
port AS p
ON p.importid = d.importid
WHERE  p.status = 2) AS a;
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This is what I use to clone a table structure (columns only)...

SELECT TOP 0 *
INTO NewTable
FROM TableStructureIWishToClone
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Create table abc select * from def limit 0;

This will definite work

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Its probably also worth mentioning that you can do the following:

Right click the table you want to duplicate > Script Table As > Create To > New Query Editor Window

Then, where is says the name of the table you just right clicked in the script that has been generated, change the name to what ever you want your new table to be called and click Execute

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Copy the table structure:-
select * into newtable from oldtable where 1=2;


Copy the table structure along with table data:-
select * into newtable from oldtable where 1=1;
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try this.. the below one copy the entire structure of the existing table but not the data.

create table AT_QUOTE_CART as select * from QUOTE_CART where 0=1 ;

if you want to copy the data then use the below one:

create table AT_QUOTE_CART as select * from QUOTE_CART ;
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FOR MYSQL:

You can use:

CREATE TABLE foo LIKE bar;

Documentation here.

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Copy structure only (copy all the columns)

Select Top 0 * into NewTable from OldTable

Copy structure only (copy some columns)

Select Top 0 Col1,Col2,Col3,Col4,Col5 into NewTable from OldTable

Copy structure with data

Select * into NewTable from OldTable

If you already have a table with same structure and you just want to copy data then use this

Insert into NewTable Select * from OldTable
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  1. If you Want to copy Same DataBase

    Select * INTO NewTableName from OldTableName

  2. If Another DataBase

    Select * INTO NewTableName from DatabaseName.OldTableName
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I use the following stored proc for copying a table's schema, including PK, indexes, partition status. It's not very swift, but seems to do the job. I I welcome any ideas how to speed it up:

    /*
Clones a table's schema from an existing table (without data)
if target table exists, it will be dropped first.
The following schema elements are cloned:
* Structure
* Primary key
* Indexes
* Constraints
DOES NOT copy:
* Triggers
* File groups


ASSUMPTION: constraints are uniquely named with the table name, so that we dont end up with duplicate constraint names
*/
CREATE PROCEDURE [dbo].[spCloneTableStructure]


@SourceTable            nvarchar(255),
@DestinationTable       nvarchar(255),
@PartionField           nvarchar(255),
@SourceSchema           nvarchar(255) = 'dbo',
@DestinationSchema      nvarchar(255) = 'dbo',
@RecreateIfExists       bit = 1


AS
BEGIN


DECLARE @msg  nvarchar(200), @PartionScript nvarchar(255), @sql NVARCHAR(MAX)


IF EXISTS(Select s.name As SchemaName, t.name As TableName
From sys.tables t
Inner Join sys.schemas s On t.schema_id = s.schema_id
Inner Join sys.partitions p on p.object_id = t.object_id
Where p.index_id In (0, 1) and t.name = @SourceTable
Group By s.name, t.name
Having Count(*) > 1)


SET @PartionScript = ' ON [PS_PartitionByCompanyId]([' + @PartionField + '])'
else
SET @PartionScript = ''


SET NOCOUNT ON;
BEGIN TRY
SET @msg ='  CloneTable  ' + @DestinationTable + ' - Step 1, Drop table if exists. Timestamp: '  + CONVERT(NVARCHAR(50),GETDATE(),108)
RAISERROR( @msg,0,1) WITH NOWAIT
--drop the table
if EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = @DestinationTable)
BEGIN
if @RecreateIfExists = 1
BEGIN
exec('DROP TABLE [' + @DestinationSchema + '].[' + @DestinationTable + ']')
END
ELSE
RETURN
END


SET @msg ='  CloneTable  ' + @DestinationTable + ' - Step 2, Create table. Timestamp: '  + CONVERT(NVARCHAR(50),GETDATE(),108)
RAISERROR( @msg,0,1) WITH NOWAIT
--create the table
exec('SELECT TOP (0) * INTO [' + @DestinationTable + '] FROM [' + @SourceTable + ']')


--create primary key
SET @msg ='  CloneTable  ' + @DestinationTable + ' - Step 3, Create primary key. Timestamp: '  + CONVERT(NVARCHAR(50),GETDATE(),108)
RAISERROR( @msg,0,1) WITH NOWAIT
DECLARE @PKSchema nvarchar(255), @PKName nvarchar(255),@count   INT
SELECT TOP 1 @PKSchema = CONSTRAINT_SCHEMA, @PKName = CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE TABLE_SCHEMA = @SourceSchema AND TABLE_NAME = @SourceTable AND CONSTRAINT_TYPE = 'PRIMARY KEY'
IF NOT @PKSchema IS NULL AND NOT @PKName IS NULL
BEGIN
DECLARE @PKColumns nvarchar(MAX)
SET @PKColumns = ''


SELECT @PKColumns = @PKColumns + '[' + COLUMN_NAME + '],'
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
where TABLE_NAME = @SourceTable and TABLE_SCHEMA = @SourceSchema AND CONSTRAINT_SCHEMA = @PKSchema AND CONSTRAINT_NAME= @PKName
ORDER BY ORDINAL_POSITION


SET @PKColumns = LEFT(@PKColumns, LEN(@PKColumns) - 1)


exec('ALTER TABLE [' + @DestinationSchema + '].[' + @DestinationTable + '] ADD  CONSTRAINT [PK_' + @DestinationTable + '] PRIMARY KEY CLUSTERED (' + @PKColumns + ')' + @PartionScript);
END


--create other indexes
SET @msg ='  CloneTable  ' + @DestinationTable + ' - Step 4, Create Indexes. Timestamp: '  + CONVERT(NVARCHAR(50),GETDATE(),108)
RAISERROR( @msg,0,1) WITH NOWAIT
DECLARE @IndexId int, @IndexName nvarchar(255), @IsUnique bit, @IsUniqueConstraint bit, @FilterDefinition nvarchar(max), @type int


set @count=0
DECLARE indexcursor CURSOR FOR
SELECT index_id, name, is_unique, is_unique_constraint, filter_definition, type FROM sys.indexes WHERE is_primary_key = 0 and object_id = object_id('[' + @SourceSchema + '].[' + @SourceTable + ']')
OPEN indexcursor;
FETCH NEXT FROM indexcursor INTO @IndexId, @IndexName, @IsUnique, @IsUniqueConstraint, @FilterDefinition, @type
WHILE @@FETCH_STATUS = 0
BEGIN
set @count =@count +1
DECLARE @Unique nvarchar(255)
SET @Unique = CASE WHEN @IsUnique = 1 THEN ' UNIQUE ' ELSE '' END


DECLARE @KeyColumns nvarchar(max), @IncludedColumns nvarchar(max)
SET @KeyColumns = ''
SET @IncludedColumns = ''


select @KeyColumns = @KeyColumns + '[' + c.name + '] ' + CASE WHEN is_descending_key = 1 THEN 'DESC' ELSE 'ASC' END + ',' from sys.index_columns ic
inner join sys.columns c ON c.object_id = ic.object_id and c.column_id = ic.column_id
where index_id = @IndexId and ic.object_id = object_id('[' + @SourceSchema + '].[' + @SourceTable + ']') and key_ordinal > 0
order by index_column_id


select @IncludedColumns = @IncludedColumns + '[' + c.name + '],' from sys.index_columns ic
inner join sys.columns c ON c.object_id = ic.object_id and c.column_id = ic.column_id
where index_id = @IndexId and ic.object_id = object_id('[' + @SourceSchema + '].[' + @SourceTable + ']') and key_ordinal = 0
order by index_column_id


IF LEN(@KeyColumns) > 0
SET @KeyColumns = LEFT(@KeyColumns, LEN(@KeyColumns) - 1)


IF LEN(@IncludedColumns) > 0
BEGIN
SET @IncludedColumns = ' INCLUDE (' + LEFT(@IncludedColumns, LEN(@IncludedColumns) - 1) + ')'
END


IF @FilterDefinition IS NULL
SET @FilterDefinition = ''
ELSE
SET @FilterDefinition = 'WHERE ' + @FilterDefinition + ' '


SET @msg ='  CloneTable  ' + @DestinationTable + ' - Step 4.' + CONVERT(NVARCHAR(5),@count) + ', Create Index ' + @IndexName + '. Timestamp: '  + CONVERT(NVARCHAR(50),GETDATE(),108)
RAISERROR( @msg,0,1) WITH NOWAIT


if @type = 2
SET @sql = 'CREATE ' + @Unique + ' NONCLUSTERED INDEX [' + @IndexName + '] ON [' + @DestinationSchema + '].[' + @DestinationTable + '] (' + @KeyColumns + ')' + @IncludedColumns + @FilterDefinition  + @PartionScript
ELSE
BEGIN
SET @sql = 'CREATE ' + @Unique + ' CLUSTERED INDEX [' + @IndexName + '] ON [' + @DestinationSchema + '].[' + @DestinationTable + '] (' + @KeyColumns + ')' + @IncludedColumns + @FilterDefinition + @PartionScript
END
EXEC (@sql)
FETCH NEXT FROM indexcursor INTO @IndexId, @IndexName, @IsUnique, @IsUniqueConstraint, @FilterDefinition, @type
END
CLOSE indexcursor
DEALLOCATE indexcursor


--create constraints
SET @msg ='  CloneTable  ' + @DestinationTable + ' - Step 5, Create constraints. Timestamp: '  + CONVERT(NVARCHAR(50),GETDATE(),108)
RAISERROR( @msg,0,1) WITH NOWAIT
DECLARE @ConstraintName nvarchar(max), @CheckClause nvarchar(max), @ColumnName NVARCHAR(255)
DECLARE const_cursor CURSOR FOR
SELECT
REPLACE(dc.name, @SourceTable, @DestinationTable),[definition], c.name
FROM sys.default_constraints dc
INNER JOIN sys.columns c ON dc.parent_object_id = c.object_id AND dc.parent_column_id = c.column_id
WHERE OBJECT_NAME(parent_object_id) =@SourceTable
OPEN const_cursor
FETCH NEXT FROM const_cursor INTO @ConstraintName, @CheckClause, @ColumnName
WHILE @@FETCH_STATUS = 0
BEGIN
exec('ALTER TABLE [' + @DestinationTable + '] ADD CONSTRAINT [' + @ConstraintName + '] DEFAULT ' + @CheckClause + ' FOR ' + @ColumnName)
FETCH NEXT FROM const_cursor INTO @ConstraintName, @CheckClause, @ColumnName
END;
CLOSE const_cursor
DEALLOCATE const_cursor




END TRY
BEGIN CATCH
IF (SELECT CURSOR_STATUS('global','indexcursor')) >= -1
BEGIN
DEALLOCATE indexcursor
END


IF (SELECT CURSOR_STATUS('global','const_cursor')) >= -1
BEGIN
DEALLOCATE const_cursor
END




PRINT 'Error Message: ' + ERROR_MESSAGE();
END CATCH


END


GO
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SELECT * INTO newtable
from Oldtable
小开

If you want to create a table with the only structure to be copied from the original table then you can use the following command to do that.

create table <tablename> as select * from <sourcetablename> where 1>2;

By this false condition you can leave the records and copy the structure.

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I needed to copy a table from one database another database. For anyone using a GUI like Sequel Ace you can right click table and click 'copy create table syntax' and run that query (you can edit the query, e.g. change table name, remove foreign keys, add/remove columns if desired)

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According to How to Clone Tables in SQL, it is:

CREATE TABLE copyTable LIKE originalTable;

That works for just the sructure. For the structure and the data use this:

CREATE TABLE new_table LIKE original_table;
INSERT INTO new_table SELECT * FROM original_table;

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