description: Learn about the Transact-SQL PIVOT and UNPIVOT relational operators. Use these operators on SELECT statements to change a table-valued expression into another table. You can use the ...
DECLARE @total_col VARCHAR(MAX) DECLARE @result NVARCHAR(MAX) SET @total_col='' SELECT @total_col = @total_col + QUOTENAME(item) + ',' FROM items SET @result=LEFT(@total_col, (LEN(@total_col)-1)) ...
Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...
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