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SQL Server Tutorial - Database queries

1. Rename Database:

In this query we will learn about How to rename database in SQL Server.
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EXEC sp_renamedb 'oldName', 'newName'
OR
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ALTER DATABASE oldName MODIFY NAME = newName

2. Rename Table:

In this query we will learn about How to rename Table in SQL Server.
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EXEC sp_rename 'OldTableName', 'NewTableName'

3. Rename Table Column:

In this query we will learn about How to rename Table Column in SQL Server.
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EXEC sp_rename 'TableName.OldColumnName' , 'NewColumnName', 'COLUMN'

4. Check SQL Server version:

In this query we will learn about How to check version of SQL Server.
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SELECT @@version

5. Get list of hard drives with free space:

In this query we will learn about How to get list of system hard drives with available free space using SQL Server.
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EXEC master..xp_fixeddrives

6. Get Id of latest inserted record:

In this query we will learn about How to Id of latest inserted record in SQL Server.
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INSERT INTO TableName (NAME,Email,Age) VALUES ('Test User','test@gmail.com',30)
     
-- Get Id of latest inserted record
SELECT SCOPE_IDENTITY()

7. Delete duplicate records:

In this query we will learn about How to delete duplicate records in SQL Server.
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DELETE
FROM TableName
WHERE ID NOT IN
(
SELECT MAX(ID)
FROM TableName
GROUP BY DuplicateColumn)

8. Display Text of Stored Procedure, Trigger, View :

In this query we will learn about How to Display Text of Stored Procedure, Trigger, View in SQL Server.
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exec sp_helptext @objname = 'getInfoFromTable' 
-- Here getInfoFromTable is my storedprocedure name

9. Get List of Primary Key and Foreign Key for a particular table :

In this query we will learn about How to get list of Primary Key and Foreign Key for a particular table in SQL Server.
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SELECT  DISTINCT 
Constraint_Name AS [ConstraintName], 
Table_Schema AS [Schema], 
Table_Name AS [Table Name] FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE 
WHERE INFORMATION_SCHEMA.KEY_COLUMN_USAGE.TABLE_NAME='TableName' 

10. Get List of Primary Key and Foreign Key of entire database:

In this query we will learn about How to get list of Primary Key and Foreign Key for a entire database in SQL Server.
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SELECT  DISTINCT 
Constraint_Name AS [ConstraintName], 
Table_Schema AS [Schema], 
Table_Name AS [Table Name] FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE 
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