How Can I Achieve Case-Insensitive Sorting in SQLite's ORDER BY Statement?

Case-Insensitive Sorting Using SQL's ORDER BY Statement

When sorting data in SQLite using the ORDER BY statement, it's crucial to consider case sensitivity. By default, SQLite distinguishes between uppercase and lowercase characters, which may lead to unexpected sorting results. To address this issue, you can employ a special technique to achieve case-insensitive sorting.

Solution: Using COLLATE NOCASE

To perform case-insensitive sorting, add the COLLATE NOCASE clause after the field name in the ORDER BY statement. This clause instructs SQLite to ignore case differences during the sorting process.

For example:

SELECT * FROM NOTES ORDER BY title COLLATE NOCASE

With this modification, the results will be sorted alphabetically, regardless of character case:

A
a
b
B
C
c
g
T

Specifying Sorting Direction

You can further specify the sorting direction (ascending or descending) by adding ASC or DESC after the COLLATE clause.

For ascending order (A to Z):

ORDER BY TITLE COLLATE NOCASE ASC

For descending order (Z to A):

ORDER BY TITLE COLLATE NOCASE DESC

The above is the detailed content of How Can I Achieve Case-Insensitive Sorting in SQLite's ORDER BY Statement?. For more information, please follow other related articles on the PHP Chinese website!