SQL_7 Some data quality checks... For Extra Spaces => Empty Strings 1-TRIM For Empty String => Nulls 2-NULLIF For Nulls => Unknown 3-ISNULL, COALESCE Now your data is ready to join, or aggregate ...
SQL functions used for manipulating strings, commonly called string functions, are among most important SQL’s tools. In this article, we’ll look at five ways you can perform various operations on ...
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