如果存在具有这些名称的表，则执行联合

Question

I have attendance database where every month new table get generated like TRNS0419,TRNS0519,TRNS0619,TRNS0719 .To combine data i have used Union. But every month i have enter table name manually, Is there any way if automaticalls picks data when ever new table gets generated such TRNS0819

I have tried using union all but its isnt taking table which is not present.

Select * from TRNS0419 union all Select * from TRNS0519
union all Select * from TRNS0619 union all Select * from TRNS0719

my query is not taking union all Select * from TRNS0819 because this isn't available in db

It should combine all tables and show result in find temp table. Please help

Answer 1

Wrap the following code in stored procedure:

DECLARE @DynamicTSQLStatement NVARCHAR(MAX);

SELECT @DynamicTSQLStatement = STUFF
(
    (
        SELECT N' UNION ALL SELECT * FROM ' + '[' + SCHEMA_NAME([schema_id]) + '].[' + [name] + ']'
        FROM [sys].[tables]
        WHERE [name] LIKE 'TRNS%'
        FOR XML PATH(''), TYPE
    ).value('.', 'NVARCHAR(MAX)')
    ,1
    ,10
    ,''
);

EXEC sp_executesql @DynamicTSQLStatement;

You can add more filters when table name is extracted from the [sys].[tables] view.