在进行字符串匹配时,可以使用ILIKE操作符代替LIKE,ILIKE会忽略大小写。 sql SELECT * FROM test WHERE info ILIKE 'bi%'; -- 忽略大小写匹配 创建自定义排序规则(Collation): 从PostgreSQL 12开始,支持通过创建自定义排序规则来实现不区分大小写的排序。 sql CREATE COLLATION case_insensitive ( PROVIDER = icu...
In PostgreSQL, LIKE is case-sensitive. For case-insensitive searches, use the ILIKE operator, which functions similarly to LIKE but ignores case. Code: SELECT * FROM customers WHERE customer_name ILIKE 'jo%'; Explanation: This query retrieves any customer whose name begins with "jo", regardles...
Searching with LIKE: LIKE is case-sensitive. iLIKE is case-insensitive. TSVECTOR, TSQUERY, ts_rank(): Websearch: selectplainto_tsquery('star wars') plain, phraseto_tsquery('star wars') phrase, websearch_to_tsquery('star wars') web1, websearch_to_tsquery('star wars or trek') web2, w...
~* Matches regular expression, case insensitive 'thomas' ~* '.*Thomas.*' !~ Does not match regular expression, case sensitive 'thomas' !~ '.*Thomas.*' !~* Does not match regular expression, case insensitive 'thomas' !~* '.*vadim.*' 注意:~相当于like Some examples: 'abc' ~ 'abc'...
useful for filtering, searching, and manipulating text. Regex allows you to identify specific patterns within text fields, making it ideal for data validation, cleaning, and advanced searches within your database. PostgreSQL supports regex-based functions like ~ (match), ~* (case-insensitive match...
I’ve ran into PostgreSQL case sensitivity myself before and I’ve seen itcome up on the forums, so I thought it might be a good thing to bring up here. Sometimes you hear that PostgreSQL is case-insensitive, but it isn’t really. What it actually does is convert your SQL to lowerca...
PostgreSQL有个ilike的方法,非常方便,之前还想着用low()等函数处理,其实不用,直接用 ilike 替换like就搞定了。 ilike (case insensitive like function). 例如:User.where("name ilike '%c%'"…
DECLARE name [BINARY] [INSENSITIVE] [NO SCROLL] CURSOR [{WITH | WITHOUT} HOLD] FOR query [FOR READ ONLY] 函数 从表中删除行. DELETE FROM [ONLY] table [[AS] alias] [USING usinglist] [WHERE condition | WHERE CURRENT OF cursor_name ] 丢弃 丢弃会话的状态. DISCARD { ALL | PLANS | ...
SQL is case insensitive about key words and identifiers, except when identifiers are double-quoted to preserve the case (not done above). varchar(80) specifies a data type that can store arbitrary character strings up to 80 characters in length. int is the normal integer type. real is a ...
Additionally, you can set the search_path as a switch to make the data case insensitive if you want only part of your application to behave like case insensitive without making any changes to the application. Drawbacks You need to add the search_path (with the util schema before pg_catalog...