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]:5432pg12@testdb=#createtablet_like(idint,c1varchar(20));CREATETABLETime:160.410ms[local]:5432pg12@testdb=#[local]:5432pg12@testdb=#insertintot_like(id,c1)values(1,'asdfafetestsdfasdf');INSERT01Time:14.815ms[local]:5432pg12@testdb=#insertintot_like(id,c1)values(2,'asdfafe测试sdfasdf');INSERT01Time:1.423ms[local]:5432pg12@testdb=#insertintot_like(id,c1)values(3,'astestfe测试sdfasdf');INSERT01Time:1.486ms[local]:5432pg12@testdb=#select*fromt_likewherec1likeANY(ARRAY['%test%','%测试%']);id|c1----+---------------------1|asdfafetestsdfasdf2|asdfafe测试sdfasdf3|astestfe测试sdfasdf(3rows)Time:48.319ms[local]:5432pg12@testdb=#select*fromt_likewherec1likeALL(ARRAY['%test%','%测试%']);id|c1----+---------------------3|astestfe测试sdfasdf(1row)Time:2.463ms[local]:5432pg12@testdb=#

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