MySQL第六天

字符串匹配模式

  1 mysql> SELECT name FROM metal;
  2 
  3 +----------+
  4 
  5 | name     |
  6 
  7 +----------+
  8 
  9 | copper   |
 10 
 11 | gold     |
 12 
 13 | iron     |
 14 
 15 | lead     |
 16 
 17 | mercury |
 18 
 19 | platinum |
 20 
 21 | silver   |
 22 
 23 | tin      |
 24 
 25 +----------+
 26 
 27 8 rows in set (0.00 sec)
 28 
 29  
 30 
 31 #查询‘co’结尾的字符串
 32 
 33 mysql> SELECT name FROM metal WHERE name LIKE 'co%';
 34 
 35 +--------+
 36 
 37 | name   |
 38 
 39 +--------+
 40 
 41 | copper |
 42 
 43 +--------+
 44 
 45 1 row in set (0.00 sec)
 46 
 47  
 48 
 49 #查询‘er’开始的字符串
 50 
 51 mysql> SELECT name FROM metal WHERE name LIKE '%er';
 52 
 53 +--------+
 54 
 55 | name   |
 56 
 57 +--------+
 58 
 59 | copper |
 60 
 61 | silver |
 62 
 63 +--------+
 64 
 65 2 rows in set (0.00 sec)
 66 
 67  
 68 
 69 #包含’er’ 字符串的
 70 
 71 mysql> SELECT name FROM metal WHERE name LIKE '%er%';
 72 
 73 +---------+
 74 
 75 | name    |
 76 
 77 +---------+
 78 
 79 | copper |
 80 
 81 | mercury |
 82 
 83 | silver |
 84 
 85 +---------+
 86 
 87 3 rows in set (0.00 sec)
 88 
 89  
 90 
 91  
 92 
 93 #查询特定位置
 94 
 95 mysql> SELECT name FROM metal WHERE name LIKE '___per%';
 96 
 97 +--------+
 98 
 99 | name   |
100 
101 +--------+
102 
103 | copper |
104 
105 +--------+
106 
107 1 row in set (0.00 sec)
108 
109  
110 
111 # NOT LIKE 相反查询 
112 
113 #不含有 i 字符
114 
115 mysql> SELECT name FROM metal WHERE name NOT LIKE '%i%';
116 
117 +---------+
118 
119 | name    |
120 
121 +---------+
122 
123 | copper |
124 
125 | gold    |
126 
127 | lead    |
128 
129 | mercury |
130 
131 +---------+
132 
133 4 rows in set (0.00 sec)
134 
135 

正则表达式匹配

#以 ‘co’开始

mysql> SELECT name FROM metal WHERE name REGEXP '^co';

+--------+

| name   |

+--------+

| copper |

+--------+

1 row in set (0.00 sec)

 

#以 ‘er’ 结束

mysql> SELECT name FROM metal WHERE name REGEXP 'er$';

+--------+

| name   |

+--------+

| copper |

| silver |

+--------+

2 rows in set (0.00 sec)

 

#包含 ‘er’

mysql> SELECT name FROM metal WHERE name REGEXP 'er';

+---------+

| name    |

+---------+

| copper |

| mercury |

| silver |

+---------+

3 rows in set (0.00 sec)

 

 

#以 ‘aeiou’中的一个字符开头，或者以 ‘er’结尾的字符串

mysql> SELECT name FROM metal WHERE name REGEXP '^[aeiou]|er$';

+--------+

| name   |

+--------+

| copper |

| iron   |

| silver |

+--------+

3 rows in set (0.00 sec)

 

正则表达式只能用于单字符集，对于UTF8或者sjis双字符字符集不起作用