SQL "select where not in subquery" returns no results
Sep 10, 2009 · The long answer (From T-SQL Fundamentals, Third edition, by Itzik Ben-Gan) This is an example: Imagine there is a order with a NULL orderid inside Sales.Orders table, so …
sql server - Using WITH in subquery (MS SQL) - Stack Overflow
Nov 29, 2013 · I'm trying to perform some recursion inside a subquery, but I don't seem to be able to use WITH - Have I missed something or is there a workaround perhaps? WHERE …
sql - NOT IN vs NOT EXISTS - Stack Overflow
The subquery inside the NOT IN statement can be evaluated at the beginning of the execution, and the temporary table can be checked against each value in the outer select, rather than re …
sql - Is there a performance difference between CTE , Sub-Query ...
Jun 23, 2012 · SQL is a declarative language, not a procedural language. That is, you construct a SQL statement to describe the results that you want. You are not telling the SQL engine how …
sql - Difference between WITH clause and subquery? - Stack …
May 6, 2015 · The WITH clause is for subquery factoring, also known as common table expressions or CTEs: The WITH query_name clause lets you assign a name to a subquery …
SQL Server Subquery returned more than 1 value. This is not …
Apr 16, 2010 · This subquery returns multiple values, SQL is complaining because it can't assign multiple values to cost in a single record. Some ideas: Fix the data such that the existing …
sql - What is the difference between LATERAL JOIN and a …
Things a subquery can't do There are things that a LATERAL join can do, but a (correlated) subquery cannot (easily). A correlated subquery can only return a single value, not multiple …
SQL WITH clause example - Stack Overflow
Sep 23, 2012 · 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 …
Nested select statement in SQL Server - Stack Overflow
We need to make an alias of the subquery because a query needs a table object which we will get from making an alias for the subquery. Conceptually, the subquery results are substituted into …
SQL LEFT JOIN Subquery Alias - Stack Overflow
Dec 19, 2016 · In MySQL used filesort, used temporary are slow and should be avoided. As for the joined subquery, it requires retrieving all rows matching the meta_key value from the …