If you need to truncate a table content in TSQL. You can use the built-in function called TRUNCATE.

In this article, we going to learn how to update a table with join another table in SQL Server.

If you have a database backup .bak file extension and want to restore it using SQL query. You can use the built-in 'RESTORE DATABASE' function. Remember in order to be able to restore a database successfully. You need to be a database owner which has the role of db_owner. You also need to ensure that there is no open session use the database.

If you need to back up a database using SQL query in SQL Server. You can use the built-in function called 'BACKUP DATABASE'.

If you need to get all user-created tables in SQL server. You can use it by retrieving the table information under sys.Tables.

To get the information about how much space or size used by tables. You can retrieve the size information by linking multiple tables in sys tables. There are two tables that hold this information. The first one is the sys.partitions table. You can get the no of rows created of a table. The second will be the sys.allocation_units table which will return the information of used_pages info.

If you need to rename a column of a table in TSQL. You have to use the built-in function 'sp_RENAME'.

GUID stands for Globally Unique Identifier. It is a universally unique id using a pseudo-random 128 bit number. GUIDs are mostly used to replace as another alternative or replacement of integer value. It is preferable to compare with numbers because it is unique across tables, databases, and servers. The drawback is it contains 4 times larger than the traditional 4-byte index value.

If you need to add a new column in TSQL. You need to use the keyword function 'ALTER TABLE'. It is recommended you perform a check if the proposed column you want to add is not already existed in the database table otherwise you will receive an error message.

If you need to find out which tables have been recently modified. You can check this by querying the sys.tables in TSQL based on the modify_date column.