outer-apply

Is there any alternative for OUTER APPLY in Oracle?

由 耗尽温柔 提交于 2020-01-14 14:33:08
问题 In the following example, I pass tbA.ID to tbC query. In this case, I used OUTER APPLY operator of SqlServer. SELECT ... FROM (SELECT ID FROM TableA ...) tbA OUTER APPLY (SELECT ... FROM TableB tbB WHERE tbA.ID = tbB.ID) tbC ... In Oracle, we don't have the OUTER APPLY operator. So, how can I pass a value (tbA.ID) from the left side query to the right side query (tbC) of the join without modifying the structure of my query? Is there any alternative for OUTER APPLY in Oracle? 回答1: SQL Servers

Where to use Outer Apply

由 落花浮王杯 提交于 2019-12-18 04:44:05
问题 MASTER TABLE x------x--------------------x | Id | Name | x------x--------------------x | 1 | A | | 2 | B | | 3 | C | x------x--------------------x DETAILS TABLE x------x--------------------x-------x | Id | PERIOD | QTY | x------x--------------------x-------x | 1 | 2014-01-13 | 10 | | 1 | 2014-01-11 | 15 | | 1 | 2014-01-12 | 20 | | 2 | 2014-01-06 | 30 | | 2 | 2014-01-08 | 40 | x------x--------------------x-------x I am getting the same results when LEFT JOIN and OUTER APPLY is used. LEFT JOIN

Parent count based on pairing of multiple children

由 怎甘沉沦 提交于 2019-12-08 14:48:30
问题 In the below example, I'm trying to count the number of drinks I can make based on the availability of ingredients per bar location that I have. To further clarify, as seen in the below example: based on the figures highlighted in the chart below; I know that I can only make 1 Margarita on 6/30/2018 (in either DC or FL if I ship the supplies to the location). Sample of data table Please use the below code to enter the relevant data above: CREATE TABLE #drinks ( a_date DATE, loc NVARCHAR(2),

The value is returned instead of NULL when using function with OUTER APPLY

由 橙三吉。 提交于 2019-12-05 11:04:50
问题 I am getting strange results when using inline function. Here is the code: IF EXISTS ( SELECT * FROM sys.objects AS o WHERE name = 'vendor_relation_users' ) DROP FUNCTION dbo.vendor_relation_users; GO CREATE FUNCTION [dbo].[vendor_relation_users] ( @user_name CHAR(12) ) RETURNS TABLE AS RETURN (SELECT @user_name AS user_name WHERE @user_name NOT LIKE '06%'); GO DECLARE @u CHAR(12) = '066BDLER' SELECT a.user_name, is_v.user_name FROM (SELECT @u AS user_name) a OUTER APPLY [dbo].[vendor

The value is returned instead of NULL when using function with OUTER APPLY

由 时光毁灭记忆、已成空白 提交于 2019-12-04 00:34:08
I am getting strange results when using inline function. Here is the code: IF EXISTS ( SELECT * FROM sys.objects AS o WHERE name = 'vendor_relation_users' ) DROP FUNCTION dbo.vendor_relation_users; GO CREATE FUNCTION [dbo].[vendor_relation_users] ( @user_name CHAR(12) ) RETURNS TABLE AS RETURN (SELECT @user_name AS user_name WHERE @user_name NOT LIKE '06%'); GO DECLARE @u CHAR(12) = '066BDLER' SELECT a.user_name, is_v.user_name FROM (SELECT @u AS user_name) a OUTER APPLY [dbo].[vendor_relation_users](@u) AS is_v SELECT a.user_name, is_v.user_name FROM (SELECT @u AS user_name) a OUTER APPLY

Entity Framework and CROSS/OUTER APPLY

由 三世轮回 提交于 2019-12-01 03:38:36
I want to create some test cases for Entity Framework queries that surely generate SQL commands that contain CROSS APPLY or OUTER APPLY operators. Could someone show typical scenarios where these kind of SQL queries appear? In LINQ 2 SQL this always results in an APPLY : from t1 in tab1 from t2 in tab2.Where(t2 => t2.SomeCol == t1.SomeCol).Take(1) select new { t1, t2 } In EF this will either fail, or also result in an APPLY (I don't know which one). This is a correlated join which requires an APPLY on the SQL side. Something like this would generate an outer apply: var ListLocation = from d in

Entity Framework and CROSS/OUTER APPLY

由 血红的双手。 提交于 2019-11-30 23:53:01
问题 I want to create some test cases for Entity Framework queries that surely generate SQL commands that contain CROSS APPLY or OUTER APPLY operators. Could someone show typical scenarios where these kind of SQL queries appear? 回答1: In LINQ 2 SQL this always results in an APPLY : from t1 in tab1 from t2 in tab2.Where(t2 => t2.SomeCol == t1.SomeCol).Take(1) select new { t1, t2 } In EF this will either fail, or also result in an APPLY (I don't know which one). This is a correlated join which

Where to use Outer Apply

由 ∥☆過路亽．° 提交于 2019-11-29 10:03:59
MASTER TABLE x------x--------------------x | Id | Name | x------x--------------------x | 1 | A | | 2 | B | | 3 | C | x------x--------------------x DETAILS TABLE x------x--------------------x-------x | Id | PERIOD | QTY | x------x--------------------x-------x | 1 | 2014-01-13 | 10 | | 1 | 2014-01-11 | 15 | | 1 | 2014-01-12 | 20 | | 2 | 2014-01-06 | 30 | | 2 | 2014-01-08 | 40 | x------x--------------------x-------x I am getting the same results when LEFT JOIN and OUTER APPLY is used. LEFT JOIN SELECT T1.ID,T1.NAME,T2.PERIOD,T2.QTY FROM MASTER T1 LEFT JOIN DETAILS T2 ON T1.ID=T2.ID OUTER APPLY
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