SQL Select From Subquery

When exploring sql selectfrom subquery, it's essential to consider various aspects and implications. 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. SQL: IF clause within WHERE clause - Stack Overflow.

In relation to this, 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?. 2060 The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server. In this context, what is the use of the square brackets [] in sql statements?.

The Microsoft book for SQL course says "You should use two-part names to refer to tables in SQL Server databases, such as Sales.Customer" so they don't ask to surround namespace with square bracket but if I remember correctly, surrounding them puts it in the right namepsace. Building on this, sQL WITH clause example - Stack Overflow. 353 The SQL WITH clause was introduced by Oracle in the Oracle 9i release 2 database. 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. The name assigned to the sub-query is treated as though it was an inline view or ...

sql - Incorrect syntax near '' - Stack Overflow. From another angle, sELECT TOP 1000 * FROM master.sys.procedures as procs left join master.sys.parameters as params on procs.object_id = params.object_id This seems totally correct, but I keep getting the following error: Msg 102, Level 15, State 1, Line 6 Incorrect syntax near ''. It works if I take out the join and only do a simple select: sql - How do I remove the first characters of a specific column in a .... Column name is Student Code and an example value is ABCD123Stu1231. SQL - Select first 10 rows only?

How do I select only the first 10 results of a query? In this context, i would like to display only the first 10 results from the following query: SELECT a.names, COUNT(b.post_title) AS num FROM sql - How to calculate age (in years) based on Date of Birth and .... I have a table listing people along with their date of birth (currently a nvarchar(25)) How can I convert that to a date, and then calculate their age in years?

My data looks as follows ID Na... 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 ...