对应SQL：
|
SELECT
(CASE
WHEN [t2].[value2] = 1 THEN @p1
ELSE @p2
END) AS [value], [t2].[value] AS [数量]
FROM (
SELECT COUNT(*) AS [value], [t1].[value] AS [value2]
FROM (
SELECT
(CASE
WHEN [t0].[Freight] > @p0 THEN 1
WHEN NOT ([t0].[Freight] > @p0) THEN 0
ELSE NULL
END) AS [value]
FROM [dbo].[Orders] AS [t0]
) AS [t1]
GROUP BY [t1].[value]
) AS [t2]
-- @p0: Input Currency (Size = 0; Prec = 19; Scale = 4) [100]
-- @p1: Input String (Size = 1; Prec = 0; Scale = 0) [是]
-- @p2: Input String (Size = 1; Prec = 0; Scale = 0) [否]
|
distinct
描述：查询顾客覆盖的国家
查询句法：
|
var 过滤相同项 = (from c in ctx.Customers orderby c.Country select c.Country).Distinct();
|
对应SQL：
|
SELECT DISTINCT [t0].[Country]
FROM [dbo].[Customers] AS [t0]
|
union
描述：查询城市是A打头和城市包含A的顾客并按照顾客名字排序
查询句法：
|
var 连接并且过滤相同项 = (from c in ctx.Customers where c.City.Contains("A") select c).Union
(from c in ctx.Customers where c.ContactName.StartsWith("A") select c).OrderBy(c => c.ContactName);
|
对应SQL：
|
SELECT [t3].[CustomerID], [t3].[CompanyName], [t3].[ContactName], [t3].[ContactTitle], [t3].[Address], [t3].[City], [t3].[Region], [t3].[PostalCode], [t3].[Country], [t3].[Phone], [t3].[Fax]
FROM (
SELECT [t2].[CustomerID], [t2].[CompanyName], [t2].[ContactName], [t2].[ContactTitle], [t2].[Address], [t2].[City], [t2].[Region], [t2].[PostalCode], [t2].[Country], [t2].[Phone], [t2].[Fax]
FROM (
SELECT [t0].[CustomerID], [t0].[CompanyName], [t0].[ContactName], [t0].[ContactTitle], [t0].[Address], [t0].[City], [t0].[Region], [t0].[PostalCode], [t0].[Country], [t0].[Phone], [t0].[Fax]
FROM [dbo].[Customers] AS [t0]
WHERE [t0].[City] LIKE @p0
UNION
SELECT [t1].[CustomerID], [t1].[CompanyName], [t1].[ContactName], [t1].[ContactTitle], [t1].[Address], [t1].[City], [t1].[Region], [t1].[PostalCode], [t1].[Country], [t1].[Phone], [t1].[Fax]
FROM [dbo].[Customers] AS [t1]
WHERE [t1].[ContactName] LIKE @p1
) AS [t2]
) AS [t3]
ORDER BY [t3].[ContactName]
-- @p0: Input String (Size = 3; Prec = 0; Scale = 0) [%A%]
-- @p1: Input String (Size = 2; Prec = 0; Scale = 0) [A%]
|
concat
描述：查询城市是A打头和城市包含A的顾客并按照顾客名字排序，相同的顾客信息不会过滤
查询句法：
|
var 连接并且不过滤相同项 = (from c in ctx.Customers where c.City.Contains("A") select c).Concat
(from c in ctx.Customers where c.ContactName.StartsWith("A") select c).OrderBy(c => c.ContactName);
|
对应SQL：
|
SELECT [t3].[CustomerID], [t3].[CompanyName], [t3].[ContactName], [t3].[ContactTitle], [t3].[Address], [t3].[City], [t3].[Region], [t3].[PostalCode], [t3].[Country], [t3].[Phone], [t3].[Fax]
FROM (
SELECT [t2].[CustomerID], [t2].[CompanyName], [t2].[ContactName], [t2].[ContactTitle], [t2].[Address], [t2].[City], [t2].[Region], [t2].[PostalCode], [t2].[Country], [t2].[Phone], [t2].[Fax]
FROM (
SELECT [t0].[CustomerID], [t0].[CompanyName], [t0].[ContactName], [t0].[ContactTitle], [t0].[Address], [t0].[City], [t0].[Region], [t0].[PostalCode], [t0].[Country], [t0].[Phone], [t0].[Fax]
FROM [dbo].[Customers] AS [t0]
WHERE [t0].[City] LIKE @p0
UNION ALL
SELECT [t1].[CustomerID], [t1].[CompanyName], [t1].[ContactName], [t1].[ContactTitle], [t1].[Address], [t1].[City], [t1].[Region], [t1].[PostalCode], [t1].[Country], [t1].[Phone], [t1].[Fax]
FROM [dbo].[Customers] AS [t1]
WHERE [t1].[ContactName] LIKE @p1
) AS [t2]
) AS [t3]
ORDER BY [t3].[ContactName]
-- @p0: Input String (Size = 3; Prec = 0; Scale = 0) [%A%]
-- @p1: Input String (Size = 2; Prec = 0; Scale = 0) [A%]
|
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