General

How do I reverse the order of data in SQL?

Standard

How do I reverse the order of data in SQL?

The SQL ORDER BY Keyword The ORDER BY keyword sorts the records in ascending order by default. To sort the records in descending order, use the DESC keyword.

Is SQL backwards compatible?

Microsoft SQL Server can attach databases from older versions, but not newer versions. For example, SQL Server 2008 can attach a database that was detached from the 2005 version, but not one detached from the 2012 version.

How do I roll back data in SQL?

In the below example, we do the following tasks.

  1. Declare a table variable @Demo.
  2. Insert a record into it.
  3. Starts an explicit transaction using BEGIN TRANSACTION.
  4. Update the record in the table variable.
  5. Rollback transaction.
  6. Check the value of the record in the table variable.

Is SQL 2019 backwards compatible?

SQL Server 2019 is backwards compatible for the below SQL Server versions: SQL Server 2019 (150) SQL Server 2017 (140) SQL Server 2016 (130)

What is Ltrim in SQL?

The LTRIM() function removes leading spaces from a string.

How can I reverse a string in SQL Server without reverse function?

Reverse String In SQL Server Without REVERSE Function

  1. CREATE function StringReverse(@inputstring varchar(max))
  2. returns varchar(max)
  3. AS.
  4. BEGIN.
  5. DECLARE @i int,
  6. @Result varchar(max)
  7. SET @Result=”
  8. SET @i = 1.

What is SQL compatibility mode?

Using compatibility level for backward compatibility. The database compatibility level setting provides backward compatibility with earlier versions of SQL Server in what relates to Transact-SQL and query optimization behaviors only for the specified database, not for the entire server.

How do I change the compatibility level in SQL?

It’s really simple to change the database compatibility level. In SQL Server Management Studio (SSMS), right-click on the database name, select Properties, select the Options node, click on the drop-down next to Compatibility level and select the level that matches your SQL Server.

How do I revert a SQL query back?

Using SQL Server Management Studio

  1. Right click on the database you wish to revert back to a point in time.
  2. Select Tasks/Restore/Database.
  3. On the restore database dialog select the Timeline option.

What is rollback in SQL with example?

ROLLBACK in SQL is a transactional control language that is used to undo the transactions that have not been saved in the database. The command is only been used to undo changes since the last COMMIT. Example: Consider the following STAFF table with records: STAFF.

What is SQL compatibility level?