Help Center/ Data Warehouse Service/ Tool Guide/ DSC/ MySQL Syntax Migrating/ Data Manipulation Language (DML)/ Division Expressions
Updated on 2025-04-10 GMT+08:00
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Division Expressions

In MySQL, in a division expression, if the divisor is 0, null is returned. GaussDB(DWS) reports an error. Therefore, the division expression is converted by adding an if condition expression.

Input

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select sum(c1) / c2 as result from table_t1;
select sum(c1) / count (c3/c4) as result from table_t1;

Output

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SELECT  (if (c2 = 0, null, sum(c1) / c2)) AS "result" FROM  table_t1;
SELECT  (if (count(if (c4 = 0, null, c3 / c4)) = 0, null, sum(c1) / count(if (c4 = 0, null, c3 / c4)))) AS "result" FROM  table_t1;