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 …
SQL: IF clause within WHERE clause - Stack Overflow
Sep 18, 2008 · 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 '%' + @
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?
How do I perform an IF...THEN in an SQL SELECT?
Sep 15, 2008 · The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server.
sql - Copy data into another table - Stack Overflow
How to copy/append data from one table into another table with same schema in SQL Server? Edit: let's say there is a query select * into table1 from table2 where 1=1 which creates table1 wi...
SQL to find the number of distinct values in a column
I can select all the distinct values in a column in the following ways: SELECT DISTINCT column_name FROM table_name; SELECT column_name FROM table_name GROUP BY column_name; But how …
Convert Month Number to Month Name Function in SQL
Oct 9, 2008 · SQL Server nowadays can get the ordinalnummer of a comma separated value of values, using the STRING_SPLIT function Also the names of the month are already stored in SQL Server …
sql - What is a stored procedure? - Stack Overflow
What is a "stored procedure" and how do they work? What is the make-up of a stored procedure (things each must have to be a stored procedure)?
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 …
SQL Replace multiple different characters in string
Aug 30, 2016 · SQL Replace multiple different characters in string Asked 9 years, 3 months ago Modified 1 year, 4 months ago Viewed 224k times