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edited Aug 11, 2020 at 13:56There is no difference between those two statements, and the optimiser will transform the IN to the = when IN has just one element in it.
Though when you have a question like this, just run both statements, run their execution plan and see the differences. Here - you won't find any.
After a big search online, I found a document on SQL to support this...
WHERE "column_name" = 'value1Here is the execution plan of both queries in Oracle (most DBMS will process this the same):
EXPLAIN PLAN FORselect * from dim_employees tContent Under CC-BY-SA license mysql - Performance differences between equal (=) and IN with …
Write clear, simple, understandable code that obviously produces correct results. Set performance goals. Then measure your code's performance. If it performs adequately, move on. Only if it isn't performing well should you spend more time on it.
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Difference Between Equal and IN operator in SQL
- The =operatoris used to compare a column valueto a specific value. It is the most basic comparison operatorand is useful when we need to check if a value in a column matches exactly with a single specified value. Consider a Studenttable with the following columns: To fetch students whose address is either ‘Delhi‘ or ‘Rohtak‘, you would use the =ope...
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SQL SERVER – Performance Comparison – …
Oct 1, 2020 · In today’s blog post let us discuss Performance Comparison – BETWEEN, IN, and Operators. I recently discussed this during the …
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IN versus Equals – SQLServerCentral Forums
May 21, 2012 · According to BOL, an IN clause is the same as the different elements with OR constraints. SELECT ... If you only have one element, they should indeed be identical. Need …
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