MAKE_SET

Sintassi

MAKE_SET(bit, str1, str2,...)

Spiegazione

Restituisce un valore set (una stringa contenente le sottostringhe separate da caratteri ","), formata dalle stringhe che corrispondono ai bit impostati a vero nell'argomento bit. str1 corrisponde al bit 0, str2 al bit 1, e così via. I valori NULL in str1, str2, etc, non vengono aggiunti al risultato.

Esempi

SELECT MAKE_SET(1,'a','b','c');
+-------------------------+
| MAKE_SET(1,'a','b','c') |
+-------------------------+
| a                       |
+-------------------------+

SELECT MAKE_SET(1 | 4,'hello','nice','world');
+----------------------------------------+
| MAKE_SET(1 | 4,'hello','nice','world') |
+----------------------------------------+
| hello,world                            |
+----------------------------------------+

SELECT MAKE_SET(1 | 4,'hello','nice',NULL,'world');
+---------------------------------------------+
| MAKE_SET(1 | 4,'hello','nice',NULL,'world') |
+---------------------------------------------+
| hello                                       |
+---------------------------------------------+

SELECT QUOTE(MAKE_SET(0,'a','b','c'));
+--------------------------------+
| QUOTE(MAKE_SET(0,'a','b','c')) |
+--------------------------------+
| ''                             |
+--------------------------------+

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