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YEARWEEK

Sintassi

YEARWEEK(data), YEARWEEK(data, modalità)

Spiegazione

Restituisce l'anno e la settimana della data specificata. L'argomento modalità ha esattamente lo stesso effetto dell'argomento modalità della funzione WEEK(). L'anno del risultato può essere differente dall'anno nell'argomento data per la prima e l'ultima settimana dell'anno.

Esempi

MariaDB [(none)]> SELECT YEARWEEK('1987-01-01');
+------------------------+
| YEARWEEK('1987-01-01') |
+------------------------+
|                 198652 |
+------------------------+
1 row in set (0.00 sec)

MariaDB [(none)]> 
CREATE TABLE t1 (d DATETIME);
INSERT INTO t1 VALUES
    ("2007-01-30 21:31:07"),
    ("1983-10-15 06:42:51"),
    ("2011-04-21 12:34:56"),
    ("2011-10-30 06:31:41"),
    ("2011-01-30 14:03:25"),
    ("2004-10-07 11:19:34");
MariaDB [test]> select * from t1;
+---------------------+
| d                   |
+---------------------+
| 2007-01-30 21:31:07 |
| 1983-10-15 06:42:51 |
| 2011-04-21 12:34:56 |
| 2011-10-30 06:31:41 |
| 2011-01-30 14:03:25 |
| 2004-10-07 11:19:34 |
+---------------------+
6 rows in set (0.02 sec)
MariaDB [test]> select YEARWEEK(d) from t1 where YEAR(d) = 2011;
+-------------+
| YEARWEEK(d) |
+-------------+
|      201116 |
|      201144 |
|      201105 |
+-------------+
3 rows in set (0.03 sec)
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