SQL Server does not have Trim() function. So we can create a own UDF (User Defined Function) function for this since SQL Sever does LTRIM(),RTRIM() functions and we can use this any time. Here I have created a simple Function for this. Create Function Trim(@mText varchar(MAX)) Returns varchar(MAX) AS Begin return LTRIM(RTRIM(@mText)) End You can run this function as shown below here, Select dbo.Trim(' Test ') So this function would return ‘Test’ only as LTRIM() function would cut off the Left side spaces and RTRIM() functiom would cut off the Right side spaces.
Stored procedures are stored in SQL Server databases. The simplest implication of stored procedures is to save complicated queries to the database and call them by name, so that users won’t have to enter the SQL statements more once. As you see, stored procedures have many more applications, and you can even use them to build business rules into the database. How to create a Stored Procedure, As shown given below, created a Stored Procedure for Inserting records into Table call Holiday_Details, which has Code and Description fields. In this Stored Procedure, passing two parametrs as INPUT Parameters and one OUTPUT parameter. Normally in Stored Procedure we can pass parameters as Input / Output Stored parameters. When you define output parameters, we have to implicitly specify the OUTPUT Keyword. Here I have shown the simple stored procedure. CREATE PROCEDURE [dbo].[SP_Holiday] @Code char(3), @Desc varchar(100), @flag bit, @Err Varchar(MAX)=Null OUTPUT AS Begin Transaction if @flag=0...
The SQL Server provides very useful feature which is Begin, Commit, Rollback Transaction. When we use Begin Transaction before we use DML Queries, we can Commit or Rollback that Transaction after the confirmation. This is very useful if you update anything wrongly then you can rollback that transaction. For example,As shown below, I am trying to update the NodeID column data to 5 from 1. begin transaction update DownLoad_Data set NodeID=5 But after I updated, You can check whether you have been updated properly. But here, I realised I did not mention the Where clause. select * from DownLoad_Data So I have to rollback this transaction. For that I can use Rollback Transaction since I used Begin Transaction. Rollback transaction So again I changed the Query and run it. Begin transaction update DownLoad_Data set NodeID=5 where RecNo=1 Still you can check whether have been updated properly. If it is updated correctly then, Run the Commit Transaction to make all updates permanently. Commit...
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