GREATEST(value1,value2,...) returns the largest (maximum-valued) argument within two or more arguments : GREATEST « Comparison Functions Operators « MySQL Tutorial

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MySQL Tutorial » Comparison Functions Operators » GREATEST   15. 6. 1. GREATEST(value1,value2,...) returns the largest (maximum-valued) argument within two or more arguments mysql> mysql> mysql> mysql> SELECT GREATEST(2,0); +---------------+ | GREATEST(2,0) | +---------------+ |             2 | +---------------+ 1 row in set (0.00 sec) mysql> 15. 6. GREATEST 15. 6. 1.  GREATEST(value1,value2,...) returns the largest (maximum-valued) argument within two or more arguments 15. 6. 2.  GREATEST(value1,value2,...) returns NULL if any argument is NULL. 15. 6. 3.  SELECT GREATEST(3.0,3.0,5.0,7.0); 15. 6. 4.  SELECT GREATEST('B','A','C'); 15. 6. 5.  Use GREATEST(value1,value2,...) function with column data 15. 6. 6.  GREATEST(@id1, @id2, @id3, @id4, @id5): using Greatest function with user-defined variables

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