In a SQL query, what is the purpose of the modulo (%) operator?
Added by Diana O.
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Step 1: Understand the Modulo Operator The modulo operator (%) is used in SQL to find the remainder of a division operation between two numbers. Show more…
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Reading Material on modulo arithmetic: Given 2 numbers a and b, a % b represents the remainder when a is divided by b. For example, 12 % 5 = 2 because 12 when divided by 5 leaves a remainder of 2. Following are some rules of modulo arithmetic: (ab) % c = (ba) % c (a + b) % c = (b + a) % c (a * b) % c = (a % c * b % c) % c (ab * db) % c = (ad) b % c = (ad % c) b % c Find the largest possible number M such that 3452 % M is equal to 1287 % M.
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div and mod A number of computer languages have built-in functions that enable you to compute many values of q and r for the quotient-remainder theorem. These functions are called div and mod in Pascal, are called / and % in C and C++, are called / and % in Java, and are called / (or ) and mod in .NET. The functions give the values that satisfy the quotient-remainder theorem when a nonnegative integer n is divided by a positive integer d and the result is assigned to an integer variable. However, they do not give the values that satisfy the quotient-remainder theorem when a negative integer n is divided by a positive integer d. Definition Given an integer n and a positive integer d, n div d = the integer quotient obtained when n is divided by d, and n mod d = the nonnegative integer remainder obtained when n is divided by d. Symbolically, if n and d are integers and d > 0, then n div d = q and n mod d = r <=> n = dq + r where q and r are integers and 0 <= r < d.
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