1.21. SQLite Glob clause

发布时间 :2025-10-25 12:31:11 UTC      

SQLite’s GLOB Operator is a text value that matches the pattern specified by a wildcard. If the search expression matches the pattern expression, the GLOB operator returns true, which is 1. Unlike the LIKE operator, GLOB is case-sensitive and follows the syntax of UNIX for the following wildcards.

  • Asterisk (*)

  • Question mark (?)

The asterisk (*) represents zero, one, or more numbers or characters. The question mark (?) represents a single number or character. These symbols can be combined.

1.21.1. Grammar

* and? The basic syntax is as follows:

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 '????'

You can use the AND Or OR Operator to combine N quantity conditions. Here, XXXX can be any number or string value.

1.21.2. Example

The following examples demonstrate the presence of’* ‘and’?’ Where the GLOB clause of the operator is different:

Statement

Description

WHERE SALARY GLOB '200*'

Find any value that starts with 200

WHERE SALARY GLOB '*200*'

Find any value that contains 200 anywhere

WHERE SALARY GLOB '?00*'

Find any value of the second and third bits that are 00

WHERE SALARY GLOB '2??'

Find any value that starts with 2 and is at least 3 characters long

WHERE SALARY GLOB '*2'

Find any value that ends in 2

WHERE SALARY GLOB '?2*3'

Find any value whose second bit is 2 and ends with 3

WHERE SALARY GLOB '2???3'

Find any value with a length of 5 digits that begins with 2 and ends with 3

Let’s give a practical example, assuming COMPANY The table has the following records:

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

Here is an example that shows COMPANY In the table AGE All records that begin with 2:

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

This will produce the following results:

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

Here is an example that shows COMPANY In the table ADDRESS All records in the text that contain a hyphen (-):

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

This will produce the following results:

ID          NAME        AGE         ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
4           Mark        25          Rich-Mond   65000.0
6           Kim         22          South-Hall  45000.0
Principles, Technologies, and Methods of Geographic Information Systems  102

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.