Category Archives for "SQL Server"

Mar 07

Should I Replace My FOR XML PATH String Merges with String_agg?

By Jeffry Schwartz | Function , Performance Tuning , Query Tuning , SQL Development , SQL Server

Overview If you are looking for major performance gains, the answer is no.  However, if you are using SQL Server 2017 and developing new code, you should consider using the new String_agg function that is available on SQL Server 2017 because code that uses this function is so much more readable and easier to write […]

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Sep 14

Finding Table Defaults, Primary and Unique Keys and Foreign Keys with sp_helpconstraint

By Lori Brown | Dependencies , Object Information , SQL Administration , SQL Development , SQL Server

A little while back I wrote a post going over sp_help in a beginning effort to find table dependency information.  https://www.sqlrx.com/using-sp_help-to-find-object-dependencies/.  That expanded to reviewing sys.dm_sql_referenced_entities & sys.dm_sql_referenced_entities  (https://www.sqlrx.com/finding_things_sql_that_reference_a_table/ & https://www.sqlrx.com/how-to-find-the-objects-and-columns-a-stored-procedure-or-view-uses/ ) and sys.sql_expression_dependencies (https://www.sqlrx.com/using-sys-sql_expression_dependencies-as-a-single-source-to-find-referenced-and-referencing-objects/  ) Now I want to loop back just a bit and expand on more information that is found in sp_help […]

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