Concatenate string with NULL value : String Append : String SQL / MySQL


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Concatenate string with NULL value



/*
mysql> select CONCAT("a",null);
+------------------+
| CONCAT("a",null) |
+------------------+
| NULL             |
+------------------+
1 row in set (0.00 sec)


*/  
select CONCAT("a",null);

           
       



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