Question : I have a table uploadedFiles which I have a column assign_users_id which has multiple users in a single […]
Category: Join
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Question : Two tables. Post and Tag. Many to Many bi-directional relationship. Post Table Tag Table Post_Tag Pivot Table ————— […]
SQL Server: How to add a full join to two tables but have matches line up?
Question : I am working with a system that has two databases. One for the ERP system and one for […]
Usefulness of Foreign Key WITHOUT reference option
Question : Sorry, if this is naive question, but I searched a lot and did not get a vivid answers. […]
Get count of unmapped records when using a mapping table
Question : I have 3 tables as such Product Product ID Product Details 1 … 2 … 3 … Vendor […]
Same Join Constraints on Multiple Columns
Question : We have a situation that I have been able to recreate with the following simple example. I have […]
Database design for Scavenger Hunt Game
Question : I’m designing a section of my database which links User, Team and Hunt. I would like users to […]
Joining two tables by the nearest match
Question : General problem: I want to do a left join on two huge tables, but there is no matching […]
Combining multiple left join for one single line
Question : We have a query as below. SELECT tblSData.header, tblEAlert.eMessage FROM tblSData LEFT JOIN tblEAlert ON tblSData.sDataID=tblEAlert.sDataID Where tblSData.aID=”.$aID.” […]
How do you join three or more records from the same table?
Question : I have table with a lot of data in it, and we would like a way to essentially […]