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SQLite GLOB子句

SQLite的GLOB运算符用于对图案使用通配符只匹配文本值。如果搜索表达式可以匹配的图案表达,GLOB运算将返回true,也就是1。 LIKE操作符不同,GLOB是大小写敏感的,它遵循以下通配符指定的UNIX语法。

  • 星号 (*)

  • 问号(?)

星号表示零个或多个数字或字符。?代表一个单一的数字或字符。

语法

*和?基本语法如下:

SELECT FROM table_name
WHERE column GLOB 'XXXX*' or SELECT FROM table_name
WHERE column GLOB '*XXXX*' or SELECT FROM table_name
WHERE column GLOB 'XXXX?' or SELECT FROM table_name
WHERE column GLOB '?XXXX' or SELECT FROM table_name
WHERE column GLOB '?XXXX?' or SELECT FROM table_name
WHERE column GLOB '????' 

可以结合的条件下使用N多的AND或OR运算。这里XXXX可能是任何数字小或字符串值。

例子:

这里有数量的例子显示WHERE部分具有不同的LIKE子句有'*'和'?'运算符:

语句 描述
WHERE SALARY GLOB '200*' Finds any values that start with 200
WHERE SALARY GLOB '*200*' Finds any values that have 200 in any position
WHERE SALARY GLOB '?00*' Finds any values that have 00 in the second and third positions
WHERE SALARY GLOB '2??' Finds any values that start with 2 and are at least 3 characters in length
WHERE SALARY GLOB '*2' Finds any values that end with 2
WHERE SALARY GLOB '?2*3' Finds any values that have a 2 in the second position and end with a 3
WHERE SALARY GLOB '2???3' Finds any values in a five-digit number that start with 2 and end with 3

让我们举一个实际的例子,考虑公司表有以下记录:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
1           Paul        32          California  20000.0
2           Allen       25          Texas       15000.0
3           Teddy       23          Norway      20000.0
4           Mark        25          Rich-Mond   65000.0
5           David       27          Texas       85000.0
6           Kim         22          South-Hall  45000.0
7           James       24          Houston     10000.0

以下是一个例子,它会显示从COMPANY 表年龄以2开始的所有记录:

sqlite> SELECT * FROM COMPANY WHERE AGE  GLOB '2*';

这将产生以下结果:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
2           Allen       25          Texas       15000.0
3           Teddy       23          Norway      20000.0
4           Mark        25          Rich-Mond   65000.0
5           David       27          Texas       85000.0
6           Kim         22          South-Hall  45000.0
7           James       24          Houston     10000.0

以下是一个例子,它会显示所有记录从COMPANY 表的ADDRESS将有一个连字符( - ),里面的文字:

sqlite> SELECT * FROM COMPANY WHERE ADDRESS  GLOB '*-*';

这将产生以下结果:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
4           Mark        25          Rich-Mond   65000.0
6           Kim         22          South-Hall  45000.0