I have a winform app connected to access database as data source , but in access i was using this below SQL to generate a query table called trend: But i do not know how execute this & populate the same in datagrid box on form load event(dataset:CSCdataset) , please help me. Answer I guess you can find mo…
Tag: sql
Create a left join with raw string data
I have a list of e-mails in a text file and a Person table with an email column. I need to know which of the emails are in the table, and which are not. So I was thinking in creating a query and do some kind of left join in my raw e-mail data with the Person table. Now, I
SQL group by a field and only return one joined row for each grouping
Table data What I want to do is group by the name, then for each group choose one of the rows with the earliest required by date. For this data set, I would like to end up with either rows 1 and 4, or rows 2 and 4. Expected result: OR I have something that returns 1,2 and 4 but
SQL server – Update one column based on the values of other columns
Say there are five columns in the table and I’d like to update the column E based on the value of column A,B,C,D. If the corresponding value is Y, then write the column name as part of the value in column E. The expected result is shown in the second image. Originally, the data in the table looks like t…
Without loop how to insert values into table from XML node
I have the following requirement. I have an XML variable of values. I now should insert the values for this XML variable to a table (Table A), but need to check if the items (one by one) in the XML variable are already present in another table (Table B) and the count of that individual item present in table B
Update a Table to add a new column and set values via a LEFT JOIN
I have a table R which in part has a column C. I have another table T which also has a column C that is of the same type and points to the same variable. I want to perform a LEFT JOIN between R and T on C so that I return the full contents of R back, but with
SQL – Conditionally join and replace values between two tables
I have two tables where one is holding “raw” data and another is holding “updated” data. The updated data just contains corrections of rows from the first table, but is essentially the same. It is a functional requirement for this data to be stored separately. I want a query with the f…
elect data from related tables with duplicate columns
I have 3 tables. news rubrics parent_id is key for id parent in table rubrics. And “news_rubriks” How I can select news which apply to rubrics.id and rubrics.parent_id ? Answer If I understand correctly, you want to apply a filter to both the rubrik id and the parent. Say if you are searching for …
Select when two tables reference the same table
I have two tables, tSellers and tBuyers. They both have FK to a table tCity. How do I join and select city name from a buyer and a seller in a order table? Expected output: Answer To expand on @jarlh ‘s comment: Example of joining on City table twice, once for Seller (to get the city of the Seller), and
MySQL: cannot add constant field at start of SELECT. Error 1064
Using MariaDB v. 10, I try to add a custom constant as the first column of my SELECT query, before all other columns *. This results in the generic syntax error 1064. For example: If I select only some columns, it works: And it also works if I use * to select all columns, but put my constant column after