SQLite is a C-language library that implements a small, fast, self-contained, high-reliability, full-featured, SQL database engine. The task of the query optimizer is to choose the most efficient execution plan. There are generally more than one possible translations of an SQL query into the procedural language.
SQLITE COUNT DISTINCT LINE HOW TO
When a query is executed by the query processor, it is translated into a procedural language that specifies how to access the data. SQL is a declarative language: it allows you to specify what to retrieve without saying how. Codd’s relational model, as described in his influential 1970 paper, “ A Relational Model of Data for Large Shared Data Banks”. SQL was one of the first commercial languages for Edgar F.
SQLITE COUNT DISTINCT LINE UPDATE
the manipulation (insert, update and delete of data) and.the definition (creation of schema and integrity constraints),.These 2 versions should give the same result set.Structured Query Language (SQL) is a language that allows: Stick another CTE in the query to de-duplicate the data first. Select 1 as id, 'A' as col1 union all select 1, 'A' union all select 1, 'B' union all select 2, 'B' This is what you are trying to do but it is not supported. null removes (should remove) this ambiguity - I'd need to double check.Įven though it looks, as you say, like count distinct is not supported in Pervasive PSQL, CTEs are supported. datatype mismatch between the case then value else value end. Gordon Linoff is correct regarding the source of your error, i.e. , Count(DISTINCT CASE WHEN SopOrder_0.SooParentOrderReference LIKE 'INT%' THEN SopOrder_0.SooParentOrderReference ELSE null END) AS 'INT' I prefer to include an else in the case because it is more consistent and complete. If you are COUNTing, you need to make NULL the thing that your are not counting. Just so know the error I get when importing at the moment is syntax error at or about "CASE WHEN sopOrder_0.SooParentOrderRefer" (10713)Ĭount distinct on the SooOrderNumber or the SooParentOrderReference, whichever makes more sense for you. I have tried using the following line but it errors on me when importing:, Count(DISTINCT CASE WHEN SopOrder_0.SooParentOrderReference LIKE 'INT%' THEN SopOrder_0.SooParentOrderReference ELSE 0 END) AS 'INT' SopOrder_0.SopOrderID = SopOrderItem_0.SopOrderIDĪND Company_0.CompanyID = SopOrder_0.CompanyID , SUM(CASE WHEN SopOrder_0.SooParentOrderReference LIKE 'WEB%' THEN 1 ELSE 0 END) AS 'WEB' , SUM(CASE WHEN SopOrder_0.SooParentOrderReference LIKE 'INT%' THEN 1 ELSE 0 END) AS 'INT' , SUM(SopOrderItem_0.SoiValue) AS 'Order Value' , SUM(CASE WHEN SopOrder_0.SooOrderNumber IS NOT NULL THEN 1 ELSE 0 END) AS 'Order Items' , Count(DISTINCT SopOrder_0.SooOrderNumber) AS 'Orders' Unfortunately I do not have SSMS and Microsoft Query is just useless. This pull from a Progress V10 ODBC that I connect through Excel. This is why I think I need a Count Distinct Case When. Now it is not a hard and fast rule that it is always doubled up. What currently comes out Company Name Order Date Order Items Orders Value WEB INTĪs you can see from my current result it is counting every line even though it is the same reference. How I expect it to be: Company Name Order Date Order Items Orders Value WEB INT Original data looks like: Company Name Order Date Order Items Orders Value REF Please see below where I have broken down what it is doing and how I expect it to be. From research I have tried creating a Count Distinct Case When statement to provide me with the results. I have been able to split this out so it does the count of how many times they appear but unfortunately it is not providing me with the intended result.
I have two unique Ids that identify if and order is Internal or Web. I have been building up a query today and I have got stuck.
0 kommentar(er)
