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What MySQL returns if the list of strings, provided as argument in FIELD() function, are NULL?
In case if all the arguments (list of strings) of FIELD() function are NULL then MySQL will return 0 as output.
Example
mysql> Select FIELD('Ram',NULL,NULL,NULL,NULL);
+----------------------------------+
| FIELD('Ram',NULL,NULL,NULL,NULL) |
+----------------------------------+
| 0 |
+----------------------------------+
1 row in set (0.00 sec)
Updated on: 20-Jun-2020
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