我环顾四周,没有找到我想要的东西,所以这里是.
I looked around some and didn't find what I was after so here goes.
SELECT * FROM trees WHERE trees.`title` LIKE '%elm%'
这很好用,但如果树被命名为 Elm 或 ELM 等就不行了...
This works fine, but not if the tree is named Elm or ELM etc...
如何让 SQL 对这个通配符搜索不区分大小写?
How do I make SQL case insensitive for this wild-card search?
我使用的是 MySQL 5 和 Apache.
I'm using MySQL 5 and Apache.
SELECT *
FROM trees
WHERE trees.`title` COLLATE UTF8_GENERAL_CI LIKE '%elm%'
实际上,如果您将 COLLATE UTF8_GENERAL_CI
添加到您的列定义中,您可以省略所有这些技巧:它会自动工作.
Actually, if you add COLLATE UTF8_GENERAL_CI
to your column's definition, you can just omit all these tricks: it will work automatically.
ALTER TABLE trees
MODIFY COLUMN title VARCHAR(…) CHARACTER
SET UTF8 COLLATE UTF8_GENERAL_CI.
这也将重建此列上的所有索引,以便它们可以用于查询而无需前导%"
This will also rebuild any indexes on this column so that they could be used for the queries without leading '%'
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