1.20. SQLite Like clause

SQLite Of LIKE Operator is a text value that matches the pattern specified by a wildcard. If the search expression matches the pattern expression, the LIKE operator returns true, which is 1. There are two wildcards associated with the LIKE Operator is used together:

Percent sign (%)
Underscore (_)

百分号（%）代表零个、一个或多个数字或字符。下划线（_）代表一个单一的数字或字符。这些符号可以被组合使用。

1.20.1. Grammar ¶

% and _ The basic syntax is as follows:

SELECT column_list FROM table_name WHERE column LIKE 'XXXX%' or SELECT column_list FROM table_name WHERE column LIKE '%XXXX%' or SELECT column_list FROM table_name WHERE column LIKE 'XXXX_' or SELECT column_list FROM table_name WHERE column LIKE '_XXXX' or SELECT column_list FROM table_name WHERE column LIKE '_XXXX_' 

You can use AND or OR operators to combine N quantities of conditions. Here, XXXX can be any number or string value.

1.20.2. Example ¶

The following examples demonstrate the value of the LIKE Where the clause is different:

Statement	Description
WHERE SALARY LIKE ‘200%’	Find any value that starts with 200
WHERE SALARY LIKE’% 200%’	Find any value that contains 200 anywhere
WHERE SALARY LIKE’_ 00%’	Find any value of the second and third bits that are 00
WHERE SALARY LIKE’2%’	Find any value that starts with 2 and is at least 3 characters long
WHERE SALARY LIKE’% 2’	Find any value that ends in 2
WHERE SALARY LIKE’_ 2% 3’	Find any value whose second bit is 2 and ends with 3
WHERE SALARY LIKE’2 million dollars 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 LIKE '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 LIKE '%-%'; 

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 