SQL Server：将所有表复制到新表中

Question

I am having a problem.

I am trying to create an easy way to make a copy of Table1 to Table2 . Now I know the Select Into , but in this there is say table 1 through table 100 and I am trying to create a duplicate of all of them. SSIS or SQL is OK.

The reason for the copy is say I have 2 tables within a classes database. Alegra 101 and 102, I am trying to create algebra 103 this will work for all of the tables, like Health 101 and 102, assume there are around 100 different classes with a 101 level and a 102 level that need a 103.

Answer 1

Not a big fan of dynamic SQL, but you might get away with something like this. Maybe you should give some more insight in to why you might want to "copy" tables - others may have more suitable solutions for you.

DECLARE @CMD NVARCHAR(4000) = ''

SELECT @CMD = @CMD + 'SELECT * INTO [dbo].[Copy_' + TABLE_NAME + ']' + ' FROM ' + TABLE_SCHEMA + '.' + TABLE_NAME + ';' + CHAR(13)
FROM INFORMATION_SCHEMA.TABLES AS t
--  Add your filtering criteria as a WHERE clause

PRINT @CMD  --  to check the code generated

-- EXEC SP_EXECUTESQL @CMD ***UNCOMMENT WHEN READY***

In light of you adding the reason for your needs, I would seriously reconsider my model. Instead of having n tables, (1 per subject\\class) - a more suitable model would be to keep all homogeneous data in the same table.

CREATE TABLE Class
(
    ClassID     INT,
    YearOfClass INT,
    ...
    ...
    ClassSubject    VARCHAR(50) -- This could be an FK to a ClassSubject Table
)

Where ClassSubject is populated with values 'Algebra 101', 'Algebra 102' etc... This will save you from having to create tables every time a new subject is added - and having to adjust all your stroed procs accordingly. Amoung many other benefits, aggregations also become simpler.