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  • The BINARY and VARBINARY Types

    mysql> CREATE TABLE t (c BINARY(3));
    Query OK, 0 rows affected (0.21 sec)
    
    mysql> INSERT INTO t SET c = 'a';
    Query OK, 1 row affected (0.18 sec)
    
    mysql>  SELECT HEX(c), c = 'a', c = 'a' from t;
    +--------+---------+-------------+
    | HEX(c) | c = 'a' | c = 'a' |
    +--------+---------+-------------+
    | 610000 |       0 |           1 |
    +--------+---------+-------------+
    1 row in set (0.00 sec)
    
    mysql> INSERT INTO t SET c = 'a';
    Query OK, 1 row affected (0.19 sec)
    
    mysql>  SELECT HEX(c), c = 'a', c = 'a' from t;
    +--------+---------+-------------+
    | HEX(c) | c = 'a' | c = 'a' |
    +--------+---------+-------------+
    | 610000 |       0 |           1 |
    | 610000 |       0 |           1 |
    +--------+---------+-------------+
    2 rows in set (0.00 sec)
    
    mysql> INSERT INTO t SET c = 'a ';
    Query OK, 1 row affected (0.19 sec)
    
    mysql>  SELECT HEX(c), c = 'a', c = 'a' from t;
    +--------+---------+-------------+
    | HEX(c) | c = 'a' | c = 'a' |
    +--------+---------+-------------+
    | 610000 |       0 |           1 |
    | 610000 |       0 |           1 |
    | 612000 |       0 |           0 |
    +--------+---------+-------------+
    3 rows in set (0.00 sec)
    
    mysql> SELECT x'4D7953514C';
    +---------------+
    | x'4D7953514C' |
    +---------------+
    | MySQL         |
    +---------------+
    1 row in set (0.00 sec)
    
    mysql> select x'612000';
    +-----------+
    | x'612000' |
    +-----------+
    | a         |
    +-----------+
    1 row in set (0.00 sec)
    
    mysql> select x'610000';
    +-----------+
    | x'610000' |
    +-----------+
    | a         |
    +-----------+
    1 row in set (0.00 sec)
    mysql> CREATE TABLE t2 (c varBINARY(3));
    Query OK, 0 rows affected (0.23 sec)
    
    mysql> INSERT INTO t2 SET c = 'a';
    Query OK, 1 row affected (0.17 sec)
    
    mysql> select * from t2;
    +------+
    | c    |
    +------+
    | a    |
    +------+
    1 row in set (0.00 sec)
    
    mysql> SELECT HEX(c), c = 'a', c = 'a' from t2;
    +--------+---------+-------------+
    | HEX(c) | c = 'a' | c = 'a' |
    +--------+---------+-------------+
    | 61     |       1 |           0 |
    +--------+---------+-------------+
    1 row in set (0.00 sec)
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  • 原文地址:https://www.cnblogs.com/zengkefu/p/5598169.html
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