PostgreSQL中的Putting multiple LIKE patterns into an array特性是什么

本篇内容主要讲解"PostgreSQL中的Putting multiple LIKE patterns into an array特性是什么"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"PostgreSQL中的Putting multiple LIKE patterns into an array特性是什么"吧!

LIKE用于模糊查询，如select from tablename where column like '%value%'；如需要多个模糊匹配则需要使用多个like子句，如select from tablename where column like '%value1%' or column like '%value2%' or column like '%value3%'或者select * from tablename where column like '%value1%' and column like '%value2%' and column like '%value3%'。PG提供了ANY/ALL结合ARRAY来简化SQL：

select from tablename where column like '%value1%' or column like '%value2%' or column like '%value3%'
->
select from tablename where column like ANY(ARRAY['%value1%','%value2%','%value3%'])

select from tablename where column like '%value1%' and column like '%value2%' and column like '%value3%'
->
select from tablename where column like ALL(ARRAY['%value1%','%value2%','%value3%'])

测试脚本

[local]:5432 pg12@testdb=# create table t_like (id int,c1 varchar(20));CREATE TABLETime: 160.410 ms[local]:5432 pg12@testdb=# [local]:5432 pg12@testdb=# insert into t_like(id,c1) values(1,'asdfafetestsdfasdf');INSERT 0 1Time: 14.815 ms[local]:5432 pg12@testdb=# insert into t_like(id,c1) values(2,'asdfafe测试sdfasdf');INSERT 0 1Time: 1.423 ms[local]:5432 pg12@testdb=# insert into t_like(id,c1) values(3,'astestfe测试sdfasdf');INSERT 0 1Time: 1.486 ms[local]:5432 pg12@testdb=# select * from t_like where c1 like ANY(ARRAY['%test%','%测试%']); id |         c1          ----+---------------------  1 | asdfafetestsdfasdf  2 | asdfafe测试sdfasdf  3 | astestfe测试sdfasdf(3 rows)Time: 48.319 ms[local]:5432 pg12@testdb=# select * from t_like where c1 like ALL(ARRAY['%test%','%测试%']); id |         c1          ----+---------------------  3 | astestfe测试sdfasdf(1 row)Time: 2.463 ms[local]:5432 pg12@testdb=#

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