C# LinqToSql查询而不是某些SQL查询
现在我需要LinqToSql查询,而不是这些查询C# LinqToSql查询而不是某些SQL查询,c#,linq-to-sql,C#,Linq To Sql,现在我需要LinqToSql查询,而不是这些查询 SELECT * FROM register WHERE user_id LIKE 'a%' SELECT * FROM register WHERE user_id LIKE '%m' SELECT * FROM register WHERE user_id LIKE '%andru%' SELECT R.name,C.country_name,S.state_name FROM register R JOIN country C O
SELECT * FROM register WHERE user_id LIKE 'a%'
SELECT * FROM register WHERE user_id LIKE '%m'
SELECT * FROM register WHERE user_id LIKE '%andru%'
SELECT R.name,C.country_name,S.state_name
FROM register R JOIN country C ON R.country_id=C.country_id
JOIN state S ON R.state_id=S.state_id
SELECT R.name,C.country_name,S.state_name
FROM register R INNER JOIN country C ON R.country_id=C.country_id
INNER JOIN state S ON R.state_id=S.state_id
注意,
内部连接
和连接
在SQL
中的功能相同,因此不需要复杂化。?@ErenErsönmez同意,我喜欢黑暗中的链接刺伤:看
var result = context.Registers.Select(x => x.StartsWith(foo)).ToList();
result = context.Registers.Select(x => x.EndsWith(foo)).ToList();
result = context.Registers.Select(x => x.Contains(foo)).ToList();
result = from register in context.Registers
join state in context.States on register.state_id equals state.state_id
select new { register.name, state.country_name, state.state_name }