Master SQL Implicit Conversion: Avoid Common Mistakes | Boost Database Performance and Efficiency

🚨 SQL TIP: Beware of Implicit Conversion(IMPLICIT_CONVERT) !!!

Did you know that one of the most common mistakes SQL developers make is not declaring the exact matching data type when assigning values to variables?

Avoiding this pitfall can save you from unexpected performance issues. Want to see how? Check out this example in my latest video! 🎥

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#SQLTips #SQLMistakes #DatabaseOptimization #SQLPerformance
Here an example:
declare @OrderID_int int =160833
declare @OrderID_vchar10 varchar(10)='160833'

SELECT *
FROM Orders
WHERE OrderID = @OrderID_int

SELECT *
FROM Orders
WHERE OrderID = @OrderID_vchar10

(4 rows affected)
Table 'Orders'. Scan count 9, logical reads 7612, physical reads 2394, page server reads 0, read-ahead reads 7470, page server read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob page server reads 0, lob read-ahead reads 0, lob page server read-ahead reads 0.

(1 row affected)

SQL Server Execution Times:
CPU time = 123 ms, elapsed time = 2642 ms.

(4 rows affected)
Table 'Orders'. Scan count 1, logical reads 3, physical reads 1, page server reads 0, read-ahead reads 0, page server read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob page server reads 0, lob read-ahead reads 0, lob page server read-ahead reads 0.

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