March 2021
Beginner to intermediate
456 pages
12h 49m
Korean
Content preview from 러닝 SQL: 데이터 생성, 검색, 조작까지 데이터 제대로 주무르기
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202
러닝 SQL
mysql> SELECT CAST('999ABC111' AS UNSIGNED INTEGER);
+---------------------------------------+
| CAST('999ABC111' AS UNSIGNED INTEGER) |
+---------------------------------------+
| 999 |
+---------------------------------------+
1 row in set, 1 warning (0.08 sec)
mysql> show warnings;
+---------+------+------------------------------------------------+
| Level | Code | Message |
+---------+------+------------------------------------------------+
| Warning | 1292 | Truncated incorrect INTEGER value: '999ABC111' |
+---------+------+------------------------------------------------+
1 row in set (0.07 sec)
이 경우 문자열의 처음 세 자리만 변환되고 나머지 문자열은 버려져 값은
999