outer-join

问题 I'm using the following select statement to populate a grid on my website with listings that have been entered into 3 tables. BND_Listing = Main Data BND_ListingCategories = My Category data for the Listing Table BND_LingingJunction = Junction Table for multi-category listings. I've just implemented the Junction table as any listing can have more than 1 Category but my problem arrises when I have (ListingX that is using CategoryY & CategoryZ) will show up on my listing twice for CatX & CatY

问题 The following join projection is throwing the error, "The 'GroupJoin' operation must be followed by a 'SelectMany' operation where the collection selector is invoking the 'DefaultIfEmpty' method." I've run over a few permutations of changes, but haven't been able to figure it out. Thoughts? EDIT: It's looking more and more like this may be a Dynamics CRM issue . The Xrm models I'm accessing for data have been generated by the CRM SDK (CRM 2011). var q = left .GroupJoin(right, c => c.Id, cl =>

问题 I have a many to many relationship table whith some datas in the jointing base a basic version of my model look like: class FooLine(models.Model): name = models.CharField(max_length=255) class FooCol(models.Model): name = models.CharField(max_length=255) class FooVal(models.Model): value = models.CharField(max_length=255) line = models.ForeignKey(FooLine) col = models.ForeignKey(FooCol) I'm trying to search every values for a certain line with a null if the value is not present (basically i'm

问题 Suppose I have a FROM clause like so : FROM apps.po_requisition_lines_all prl, apps.po_requisition_headers_all prha, po.po_req_distributions_all prda, po.po_distributions_all pda, po.po_headers_all pha where 1=1 and prl.requisition_header_id= prha.requisition_header_id and prl.requisition_line_id= prda.requisition_line_id and prda.distribution_id= pda.req_distribution_id(+) and pha.po_header_id(+)=pda.po_header_id Then how does this type of OUTER JOIN get converted if we want to use normal

问题 I am missing something fundamental here I believe. I have the following EF code-first entities: Company and Modem. A company can have a list of modems. public class Company { public int ID { get; set; } ... public virtual ICollection<Modem> Modems { get; set:} } public class Modem { public int ID { get; set; } ... } This generates a column Company_ID as a foreign key, on the Modem table. I want to return all modems, with their company ID, if available. In SQL I would do the following : select

问题 I need to implement the query using expressions syntax (because I don't know types in compile time). For example query like this one: from customer in Customers join purchase in Purchases on customer.ID equals purchase.CustomerID into outerJoin from range in outerJoin.DefaultIfEmpty() where customer.Name == "SomeName" && range.Description.Contains("SomeString") && customer.ID == range.CustomerID select new { Customer = customer, Purchase = range } I found way to implement group join part like

问题 I have a table structure with three tables: profiles, profile_subrubriek and rubrieken. I query the data with the following query: SELECT profiles.hoofdrubriek, profiles.plaats , profiles.bedrijfsnaam, profiles.gemeente, profiles.bedrijfsslogan , profiles.straatnaam, profiles.huisnummer, profiles.postcode , profiles.telefoonnummer, profiles.fax, profiles.email , profiles.website, profiles.bedrijfslogo FROM profiles INNER JOIN profile_subrubriek ON profiles.ID=profile_subrubriek.profile_id

问题 I have the following query: select * from per_all_assignments_f paaf, pay_all_payrolls_f payr where sysdate between paaf.effective_start_date and paaf.effective_end_date and paaf.assignment_type in ('E', 'C') and paaf.primary_flag = 'Y' and payr.payroll_id (+) = paaf.payroll_id and nvl(payr.attribute1 (+), '$XXX$') in ('TINT') and paaf.effective_start_date between nvl(payr.effective_start_date (+), to_date('01/01/1000', 'dd/mm/yyyy')) and nvl(payr.effective_end_date (+), to_date('31/12/4712',

问题 select art.artno, art.name from Art left outer join store on art.artno =store.artno where art.Artno not in (select art.artno from store) The query is supposed to be like this but seems not working(I do not get any result rows beside the column names). Using a MSSQL 2008. table art table store EXPECTED RESULT artno name artno qty artno name 1 xbox360 1 1 2 XHW 2 XHW 3 2 5 PS2 3 NETANDO 4 1 5 PS2 6 3 6 PS1 4 X1 How do I write a query to get the Expected out shown in the example? Just to let you

问题 This question already has answers here : where is the fault in my sql code? (2 answers) Closed 4 years ago . $sql = 'SELECT * FROM t1 RIGHT OUTER JOIN t2 ON t2.wid = t1.wid LIMIT ' . $number . ' OFFSET 678'; When i change by my hand this offset it runs for different values of my database... How I can do it without change with my hand this offset?? Someone said me that I can do it without offset but he did not tell me how... Could someone help plz?? I have over a month with this issue :'( :'(