It is best to avoid using the * operator in your queries, use explicit column names instead.
SQL Server scans through all column names and replaces the * operator with all the column names of the tables.
Home » T-SQL Performance Tip: The * Operator
It is best to avoid using the * operator in your queries, use explicit column names instead.
SQL Server scans through all column names and replaces the * operator with all the column names of the tables.
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