Sql performance tuning interview questions and answers. Products p WHERE NOT EXISTS ( SELECT 1 FROM Northwind.

Sql performance tuning interview questions and answers. Setting up a sample table DROP TABLE IF EXISTS contacts; CREATE TABLE contacts( contact_id INT IDENTITY(1,1) PRIMARY KEY,. Use DELETE statement to remove the duplicate rows. In MS SQL Server Database, use this query to get the tables and respective column names that contains the input text: SELECT t. Setting up a sample table DROP TABLE IF EXISTS contacts; CREATE TABLE contacts( contact_id INT IDENTITY(1,1) PRIMARY KEY, Nov 8, 2013 · What does <> (angle brackets) mean in MS-SQL Server? Asked 11 years, 10 months ago Modified 4 years, 1 month ago Viewed 81k times Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind. in Microsoft Press training kit for 70-461 exam, "Querying Microsoft SQL Server", they say "As an example of when to choose the standard form, T-SQL supports two “not equal to” operators: <> and !=. Yes; Microsoft themselves recommend using <> over != specifically for ANSI compliance, e. name AS tableName, c. Nov 8, 2013 · What does <> (angle brackets) mean in MS-SQL Server? Asked 11 years, 10 months ago Modified 4 years, 1 month ago Viewed 81k times Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind. The SQL WITH clause allows you to give a sub-query block a name (a process also called sub-query refactoring), which can be referenced in several places within the main SQL query. name AS columnName 10 To delete the duplicate rows from the table in SQL Server, you follow these steps: Find duplicate rows using GROUP BY clause or ROW_NUMBER () function. oaru4g ick tw ndr cgzk skze2 9qt9 3yr2 zja8x pg0nm2