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Operator Precedence
The basic operators used in SQL are * / - +
Operators of the similar priority are evaluated From Left to right
Parentheses are used to force prioritized evaluation.
Example:
SELECT ENAME, SAL, 12*SAL+100
FROM EMP;
SELECT ENAME, SAL, 12*(SAL+100) FROM EMP;
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examples of fields in a database
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