T-SQL – DELETE Statement The SQL Server DELETE Query is used to delete the existing records from a table. You have to use WHERE clause with DELETE query to delete selected rows, otherwise all the records would be deleted. Syntax Following is the basic syntax of DELETE query with WHERE clause − DELETE FROM table_name […]
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T-SQL – DISTINCT Clause The MS SQL Server DISTINCT keyword is used in conjunction with SELECT statement to eliminate all the duplicate records and fetching only unique records. There may be a situation when you have multiple duplicate records in a table. While fetching such records, it makes more sense to fetch only unique records […]
T-SQL – Sub-Queries A sub-query or Inner query or Nested query is a query within another SQL Server query and embedded within the WHERE clause. A sub query is used to return data that will be used in the main query as a condition to further restrict the data to be retrieved. Sub queries can […]