left-join

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MySQL: different results with a WHERE statement included in master-detail query?

Let\'s say I have a mastertable (table1) with a detailtable (table2). There can be multiple detail records for each masterrecord. Now I want a query that counts all detailrecords for each masterrecord[详细]

2023-03-22 06:31 分类：问答
How to convert multiple SQL LEFT JOIN statement with where clause to LINQ

Is there any way to convert following SQL statement into LINQ? select ve.EntityID , fin1.FinanceStat as FinanceStat_New[详细]

2023-03-22 03:08 分类：问答
MySQL - If Table A is LEFT JOINed to Table B, how do I ORDER BY a field in Table B?

Here is my SQL query: SELECTpts.pts_id, pts.pts_name, meds.* FROMpts LEFT JOIN meds ON pts.pts_id = meds.pts_id_fk[详细]

2023-03-21 11:35 分类：问答
SQL: Turn a subquery into a join: How to refer to outside table in nested join where clause?

I am trying to change my sub-query in to a join where it selects only one record in the sub-query.It seems to run the sub-query for each found record, taking over a minute to execute:[详细]

2023-03-21 07:39 分类：问答
generic method to get linq result to datatable for select new with multiple selects

I\'m trying to get the result of a join query with multiple selects into a dataTable, without selecting every fields separately.[详细]

2023-03-21 07:39 分类：问答
Get an average vote rating for males/females/all in one mysql query

I have the following headache… I\'m trying to get the average rating for three different clauses in one go, I thought maybe using the UNION command would work but it will only find values from the fi[详细]

2023-03-19 10:36 分类：问答
Using IS NULL or IS NOT NULL on join conditions - Theory question

Theory question here: Why does specifying table.field IS NULL or table.field IS NOT NULL not work on a join condition (left or right join for instance) but only in the where condition?[详细]

2023-03-19 04:09 分类：问答
Forcing all rows from first table of a join

I have three tables, machines holding vending machines, products holding al开发者_开发技巧l possible products, and machines_products which is the intersection of the two, giving how many of each produ[详细]

2023-03-18 03:42 分类：问答
db2 sql left join table help

I have a sql query like this, select t1.id as ID, case when t2.field1 = 1102 then (t2.field3 - t2.field2) end as A,[详细]

2023-03-17 18:25 分类：问答
Problems with Left join Query LinqToSql

IBookingRepository bookingResp = new BookingRepository(); IQueryable<bookingTest> bookings = bookingResp.GetAllBookingsByView();[详细]

2023-03-17 03:51 分类：问答