To make a string comparison not case sensitive, convert both strings to the same lettercase using UPPER( ) or : String Compare « String « SQL / MySQL

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SQL / MySQL » String » String Compare 




To make a string comparison not case sensitive, convert both strings to the same lettercase using UPPER( ) or
      
LOWER( ):
mysql>
mysql> SELECT UPPER('A'), UPPER('b'), UPPER('A'< UPPER('b');
+------------+------------+-------------------------+
| UPPER('A'| UPPER('b'| UPPER('A'< UPPER('b'|
+------------+------------+-------------------------+
| A          | B          |                       |
+------------+------------+-------------------------+
row in set (0.00 sec)

mysql>
mysql>
mysql> SELECT LOWER('A'), LOWER('b'), LOWER('A'< LOWER('b');
+------------+------------+-------------------------+
| LOWER('A'| LOWER('b'| LOWER('A'< LOWER('b'|
+------------+------------+-------------------------+
| a          | b          |                       |
+------------+------------+-------------------------+
row in set (0.00 sec)

mysql>

   
    
    
    
    
    
  














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3.The two strings '4200' and '4200.0' are not the same:
4.Case-insensitive nature of string comparisons:
5.String comparisons in MySQL are not case sensitive by default:
6.To make a string comparison case sensitive, cast (convert) one of the strings to binary form by using the BINA
7.NULL values fail comparisons both with < and with >=
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