union-all

问题 I've 2 tables: create table advertised_products(id int,title varchar(99),timestamp timestamp); insert advertised_products select 1,'t1',curdate(); create table wanted_products(id int,title varchar(99),timestamp timestamp); insert wanted_products select 1,'t1',now(); I'm using this query to get the records: ( SELECT ap.*, 'advertised' as type FROM advertised_products as ap ) union all ( SELECT wp.*, 'wanted' as type FROM wanted_products as wp ) ORDER BY timestamp desc limit 3 But it gives

问题 I have a table with rows that's grouped if the date and the category 'bar' matches, now I need to INNER JOIN these with another table and use a WHERE answer = '2' from that table, but I don't know how to do that. SELECT category, date, client FROM sbs_events WHERE category <> 'bar' UNION ALL SELECT category, date, MIN(client) AS client FROM sbs_events WHERE category = 'bar' GROUP BY category, date I've made a SQL Fiddle The thing I need to add to the fiddle is INNER JOIN sbs_userEvents ON sbs

问题 Access 2013 I have several logs that are consolidated using a UNION ALL query that is written by a macro. The resulting Query is as follows: SELECT [zData Navy FY15 AFS].[Journal Voucher ID], Count([zData Navy FY15 AFS].[Journal Voucher ID]) AS [Record Count], First([zData Navy FY15 AFS].[Table Source]) AS [Table Source], First([zData Navy FY15 AFS].[dBranch]) AS [dBranch], First([zData Navy FY15 AFS].[DB_ID]) AS [DB_ID], First([zData Navy FY15 AFS].[Source]) AS [Source], First([zData Navy

问题 In SQL server union , result is sorted based on primary key column. I want to prevent this behavior in entity framework. In this post, @praveen has explained how to do this in pure sql. But I want to do this in entity framework. My code : public virtual ActionResult Search(string keyword) { var products = _db.Products .Where(x => x.IsActive) .AsQueryable(); var productExactlyTitle = products.Where(x => x.Title == keyword); var productStartTitle = products.Where(x => x.Title.StartsWith(keyword

问题 This is pretty complicated for a person just learning Linq! I asked how to JOIN and GROUP BY in this question and a BIG SHOUT OUT to TriV for his explicit and very helpful answer. Now, I want to take my already very complicated query and create a UNION to a similar query. I have below, 2 separate SQL queries that I have put into 1 query using a UNION clause. The first query joins two tables. But the second query is against only one table, because it is for unassigned assets that are not

问题 I have this query implemented in two ways: SELECT race1, mode1 FROM organization WHERE condition = 1 LIMIT 1 UNION ALL (SELECT race2, mode2 FROM organization WHERE condition = 1 LIMIT 1) UNION ALL (SELECT race, mode FROM organization_new WHERE PK_Id = 1) And SELECT race1, mode1 FROM organization WHERE condition = 1 LIMIT 1 UNION ALL SELECT race2, mode2 FROM organization WHERE condition = 1 LIMIT 1 UNION ALL SELECT race, mode FROM organization_new WHERE PK_Id = 1 As you can see, the difference

问题 I have two tables for user posts, one for text post and one for multimedia post, the structure of both tables is as follows. table text_post +--------+--------------+-----------+-----------+-----------------+-----------+ | postid | post_content | post_user | post_type | post_visibility | post_date | +--------+--------------+-----------+-----------+-----------------+-----------+ table multimedia_post +-------+------------+--------+---------+---------+---------------+---------+ |post_id|post

问题 Hi I have below query in an SP @CrmContactId is a parameter to the SP. Select distinct A.PolicyBusinessId, A.PolicyDetailId from TPolicyBusiness A inner join TPolicyOwner B on a.PolicyDetailId=b.PolicyDetailId Left Join TAdditionalOwner C on c.PolicyBusinessId=A.PolicyBusinessId where (b.CRMContactId = @CRMContactId) we made a new change and introduced an OR condition Select distinct A.PolicyBusinessId, A.PolicyDetailId from TPolicyBusiness A inner join TPolicyOwner B on a.PolicyDetailId=b

问题 What is the expected behaviour due to SQL Standard when we perform UNION on two tables with different data types: create table "tab1" ("c1" varchar(max)); create table "tab2" ("c3" integer); insert into tab1 values(N'asd'), (N'qweqwe'); insert into tab2 values(123), (345); select c_newname as myname from ( select "c1" as c_newname from "tab1" union all select "c3" from "tab2" ) as T_UNI; MS SQL Server gives Conversion failed when converting the varchar value 'asd' to data type int. but what

问题 I need help also about paging and using UNION ALL for multiple tables: How do i implement an optimized paging when joining multiple tables using UNION ALL and returning only specific number of rows... declare @startRow int declare @PageCount int set @startRow = 0 set @PageCount = 20 set rowcount @PageCount select Row_Number() OVER(Order by col1) as RowNumber, col1, col2 from ( select col1, col2 from table1 where datetimeCol between (@dateFrom and @dateTo) union all select col1, col2 from