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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;
a. Construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4 would require reconstruction of at least two ho
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What is meant by Physical blocks? The input and output operations are completed in block units. The blocks residing on the disk are referred to as physical blocks.
What is NULL? Simply NULL means not in value.
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