MySQL에 테이블이 존재하는지 확인하기 위해 INFORMATION_SCHEMA.TABLES를 사용할 수 있습니다. 먼저 테이블을 생성하겠습니다 -
mysql> create table Client_information -> ( -> Id int, -> Name varchar(10) -> ); Query OK, 0 rows affected (0.48 sec)
다음은 삽입 명령을 사용하여 테이블에 일부 레코드를 삽입하는 쿼리입니다 -
mysql> insert into Client_information values(1,'Larry'); Query OK, 1 row affected (0.14 sec) mysql> insert into Client_information values(2,'Mike'); Query OK, 1 row affected (0.17 sec) mysql> insert into Client_information values(3,'Sam'); Query OK, 1 row affected (0.19 sec)
다음은 select 문을 사용하여 테이블의 모든 레코드를 표시하는 쿼리입니다 -
mysql> select * from Client_information;
이것은 다음과 같은 출력을 생성합니다 -
+------+-------+ | Id | Name | +------+-------+ | 1 | Larry | | 2 | Mike | | 3 | Sam | +------+-------+ 3 rows in set (0.00 sec)
다음은 MySQL에 테이블이 존재하는지 확인하는 쿼리입니다 -
mysql> select * from information_schema.tables where table_name='Client_information';
출력 상태에 따라 "Client_information" 테이블이 존재합니다 -
+---------------+--------------+--------------------+------------+--------+---------+------------+------------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+--------------------+----------+----------------+---------------+ | TABLE_CATALOG | TABLE_SCHEMA | TABLE_NAME | TABLE_TYPE | ENGINE | VERSION | ROW_FORMAT | TABLE_ROWS | AVG_ROW_LENGTH | DATA_LENGTH | MAX_DATA_LENGTH | INDEX_LENGTH | DATA_FREE | AUTO_INCREMENT | CREATE_TIME | UPDATE_TIME | CHECK_TIME | TABLE_COLLATION | CHECKSUM | CREATE_OPTIONS | TABLE_COMMENT | +---------------+--------------+--------------------+------------+--------+---------+------------+------------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+--------------------+----------+----------------+---------------+ | def | sample | client_information | BASE TABLE | InnoDB | 10 | Dynamic | 4 | 4096 | 16384 | 0 | 0 | 0 | NULL | 2019-03-11 20:02:40 | NULL | NULL | utf8_general_ci | NULL | | | | def | test | client_information | BASE TABLE | InnoDB | 10 | Dynamic | 3 | 5461 | 16384 | 0 | 0 | 0 | NULL | 2019-04-03 02:28:31 | 2019-04-03 02:29:00 | NULL | utf8mb4_0900_ai_ci | NULL | | | +---------------+--------------+--------------------+------------+--------+---------+------------+------------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+--------------------+----------+----------------+---------------+ 2 rows in set (0.13 sec)