- sql - NOT IN vs NOT EXISTS - Stack Overflow
Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind Products p WHERE NOT EXISTS ( SELECT 1 FROM Northwind [Order Details] od WHERE p
- Should I use != or lt; gt; for not equal in T-SQL? - Stack Overflow
Yes; Microsoft themselves recommend using <> over != specifically for ANSI compliance, e g 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 != The former is standard and the latter is not
- SQL: IF clause within WHERE clause - Stack Overflow
Is it possible to use an IF clause within a WHERE clause in MS SQL? Example: WHERE IF IsNumeric(@OrderNumber) = 1 OrderNumber = @OrderNumber ELSE OrderNumber LIKE '%' + @
- How do I perform an IF. . . THEN in an SQL SELECT?
The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server
- sql - Concatenate text from multiple rows into a single text string . . .
Consider a database table holding names, with three rows: Peter Paul Mary Is there an easy way to turn this into a single string of Peter, Paul, Mary?
- SQL to find the number of distinct values in a column
SQL to find the number of distinct values in a column Asked 17 years, 2 months ago Modified 2 years, 7 months ago Viewed 826k times
- sql server - SQL MAX of multiple columns? - Stack Overflow
How do you return 1 value per row of the max of several columns: TableName [Number, Date1, Date2, Date3, Cost] I need to return something like this: [Number, Most_Recent_Date, Cost] Query?
- Convert Rows to columns using Pivot in SQL Server
Pivot is one of the SQL operator which is used to turn the unique data from one column into multiple column in the output This is also mean by transforming the rows into columns (rotating table) Let us consider this table, If I want to filter this data based on the types of product (Speaker, Glass, Headset) by each customer, then use Pivot
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