Sql-server – SQL Server : stored procedure transaction

sql serverstored-procedurestransactions

Hello I got some stored procedures to create products and other stuff on my site. Now I have to run some of them in a transaction. Is that possible or do I have to make a stored procedure only for the transaction?

Can I say something like

BEGIN TRAN
"1. stored procedure"
"2. stored procedure"
COMMIT

Best Answer

To add to the other answers above, you may want to add some error handling:

BEGIN TRAN

BEGIN TRY

   EXEC P1

   EXEC P2

   COMMIT TRAN

END TRY
BEGIN CATCH

  ROLLBACK TRAN

END CATCH

Update with C# code (I personally find it a lot easier to keep trans code out of the sprocs and in the data layer - makes composing stored procedures easier at a later stage):

using (var conn = new SqlConnection(...))

    trans = conn.BeginTransaction();

    try
   {
       ...call P1 using transaction
       ...call P2 using transaction

       trans.Commit();
   }
   catch
   {
       trans.RollBack();
       throw;
   }
}

Syntax:

ALTER TABLE {TABLENAME} 
ADD {COLUMNNAME} {TYPE} {NULL|NOT NULL} 
CONSTRAINT {CONSTRAINT_NAME} DEFAULT {DEFAULT_VALUE}
WITH VALUES

Example:

ALTER TABLE SomeTable
        ADD SomeCol Bit NULL --Or NOT NULL.
 CONSTRAINT D_SomeTable_SomeCol --When Omitted a Default-Constraint Name is autogenerated.
    DEFAULT (0)--Optional Default-Constraint.
WITH VALUES --Add if Column is Nullable and you want the Default Value for Existing Records.

Notes:

Optional Constraint Name:
If you leave out CONSTRAINT D_SomeTable_SomeCol then SQL Server will autogenerate
a Default-Contraint with a funny Name like: DF__SomeTa__SomeC__4FB7FEF6

Optional With-Values Statement:
The WITH VALUES is only needed when your Column is Nullable
and you want the Default Value used for Existing Records.
If your Column is NOT NULL, then it will automatically use the Default Value
for all Existing Records, whether you specify WITH VALUES or not.

How Inserts work with a Default-Constraint:
If you insert a Record into SomeTable and do not Specify SomeCol's value, then it will Default to 0.
If you insert a Record and Specify SomeCol's value as NULL (and your column allows nulls),
then the Default-Constraint will not be used and NULL will be inserted as the Value.

Notes were based on everyone's great feedback below.
Special Thanks to:
@Yatrix, @WalterStabosz, @YahooSerious, and @StackMan for their Comments.

Sql-server – How to check if a column exists in a SQL Server table

SQL Server 2005 onwards:

IF EXISTS(SELECT 1 FROM sys.columns 
          WHERE Name = N'columnName'
          AND Object_ID = Object_ID(N'schemaName.tableName'))
BEGIN
    -- Column Exists
END

Martin Smith's version is shorter:

IF COL_LENGTH('schemaName.tableName', 'columnName') IS NOT NULL
BEGIN
    -- Column Exists
END

Best Answer

Related Solutions

Sql – Add a column with a default value to an existing table in SQL Server

Syntax:

Example:

Notes:

Sql-server – How to check if a column exists in a SQL Server table

Related Topic