如何使用以编程方式包含多列的 where-in 子句进行 PostgreSQL 查询?
How to do a PostgreSQL query with where-in clause which contains multiple columns programmatically?
我的查询是这样的:
select * from plat_customs_complex
where (code_t,code_s)
in (('01013090','10'),('01029010','90'));
它在 psql 控制台中运行良好。我的问题是如何在客户端代码中执行此查询。(通过 C# 或 Java)
而且我已经知道以下代码运行良好(C#):
string[] codeT = new string[]{"01013090","01029010"};
connection.Query("SELECT * FROM plat_customs_complex WHERE code_t=ANY(@CodeT)",
new { CodeT = codeT });
最后,我发现 unnest
函数可以提供帮助。
纯粹的SQL就是这样:
select * from plat_customs_complex
where (code_t,code_s) = ANY(select * from unnest(ARRAY['01013090','01029010'],ARRAY['10','90']))
可以轻松将其转换为 C# 代码:
string[] codeTs = new string[]{"01013090","01029010"};
string[] codeSs = new string[]{"10", "90"};
connection.Query("select * from plat_customs_complex
where (code_t,code_s) = ANY(select * from unnest(@CodeTs, @CodeSs))",
new {CodeTs=codeTs, CodeSs=codeSs});
我的查询是这样的:
select * from plat_customs_complex
where (code_t,code_s)
in (('01013090','10'),('01029010','90'));
它在 psql 控制台中运行良好。我的问题是如何在客户端代码中执行此查询。(通过 C# 或 Java)
而且我已经知道以下代码运行良好(C#):
string[] codeT = new string[]{"01013090","01029010"};
connection.Query("SELECT * FROM plat_customs_complex WHERE code_t=ANY(@CodeT)",
new { CodeT = codeT });
最后,我发现 unnest
函数可以提供帮助。
纯粹的SQL就是这样:
select * from plat_customs_complex
where (code_t,code_s) = ANY(select * from unnest(ARRAY['01013090','01029010'],ARRAY['10','90']))
可以轻松将其转换为 C# 代码:
string[] codeTs = new string[]{"01013090","01029010"};
string[] codeSs = new string[]{"10", "90"};
connection.Query("select * from plat_customs_complex
where (code_t,code_s) = ANY(select * from unnest(@CodeTs, @CodeSs))",
new {CodeTs=codeTs, CodeSs=codeSs});