T sql multiple joins to the same table

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Stairway to Advanced T-SQL Level 3: Understanding Common Table Expressions (CTEs) - SQLServerCentral

  http://www.sqlservercentral.com/articles/Stairway+Series/122606/
There can be multiple anchor query definitions where each one is combined with the others using one of these operators: UNION ALL, UNION, INTERSECT, or EXCEPT. By using 0 for a MAXRECURSION setting, you are allowing the database engine to run as many iteration as it needs to complete the recursive part of the CTE

Stairway to Advanced T-SQL Level 1: Introduction to Advanced Transact SQL Stairway and Using the CROSS JOIN Operator - SQLServerCentral

  http://www.sqlservercentral.com/articles/Stairway+Series/119933/
By reducing the result set of the CROSS JOIN operation my query in Listing 9 ran in less than 1 second, whereas the code in Listing 8 runs in 19 seconds on my machine. But if you look at the estimated number of records generated from the Nested Loops (Inner Join) operation, on the right side of the graphical plan, you will see that Listing 8 estimates 52,338,000 records, whereas the same operation in Listing 9 only estimates 61,000 records

  http://sqlmag.com/t-sql/t-sql-join-types
As this example demonstrates, you should use the left outer join when you know that you have data in one table, but you might not have a match in the second table. Because there are no rows in the PhoneNumbers table with a null PhoneNumberID, this is effectively left joining all the People rows and zero rows from PhoneNumbers

sql server - Is it possible to delete from multiple tables in the same SQL statement? - Stack Overflow

  http://stackoverflow.com/questions/17539145/is-it-possible-to-delete-from-multiple-tables-in-the-same-sql-statement
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