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- 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
- How to select unique records by SQL - Stack Overflow
How to select unique records by SQL Asked 16 years, 1 month ago Modified 1 year, 11 months ago Viewed 747k times
- 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
- How to calculate percentage with a SQL statement
Due to precedence of SQL statements it will be the same however, due to data types if using 100 you can still get the result rounded to 0 decimals you desire for the % where as if you put it after the division operation you would have to make sure that you cast to a data type that can handle the decimal places otherwise you will end up with
- sql - Must declare the scalar variable - Stack Overflow
@MyVariable and @myvariable are the same variables in SQL Server Man Studio and will work However, these variables will result in a "Must declare the scalar variable "@MyVariable" in Visual Studio (C#) due to case-sensitivity differences
- Truncate (not round) decimal places in SQL Server
I'm trying to determine the best way to truncate or drop extra decimal places in SQL without rounding For example: declare @value decimal(18,2) set @value = 123 456 This will automatically round @
- SQL WHERE. . IN clause multiple columns - Stack Overflow
SELECT * FROM table1 WHERE (CM_PLAN_ID, Individual_ID) IN ( SELECT CM_PLAN_ID, Individual_ID FROM CRM_VCM_CURRENT_LEAD_STATUS WHERE Lead_Key = :_Lead_Key ) But the WHERE IN clause allows only 1 column How can I compare 2 or more columns with another inner SELECT?
- SQL - Update multiple records in one query - Stack Overflow
I have table - config Schema: config_name | config_value And I would like to update multiple records in one query I try like that: UPDATE config SET t1 config_value = 'value' , t2 config_va
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