Jul 2, 2019 · If you have duplicates on table2, when you join it with table1 it will render duplicate rows of table1 (one for each relative value on table2). SELECT fieldx FROM table2 GROUP …

Jan 27, 2022 · Do you have unwanted duplicates from your SQL JOIN query? In this article, I’ll discuss the possible reasons for getting duplicates after joining tables in SQL and show how to …

Missing or incomplete ON conditions, selecting a subset of columns, using the wrong JOIN types, and incorrect use of the EXISTS keyword can all lead to duplicate data. By practicing SQL …

Aug 25, 2022 · SELECT g.first_name, ex.pmt_method, ex.pmt_date, ex.pmt_amount AS paid, e.description FROM booking b INNER JOIN guest_test g ON b.guest_id = g.id INNER JOIN …

Dec 22, 2020 · I need to bring in all the data from table A hence left join, but table B bring duplicates, taking it to millions of records, instead of in thousands. Table A and B both have …

You can do this using generic SQL with group by: SELECT C.Content_ID, C.Content_Title, MAX(M.Media_Id) FROM tbl_Contents C LEFT JOIN tbl_Media M ON M.Content_Id = …

Oct 14, 2024 · Learn how to avoid duplicates in SQL left joins by adding time ranges, using DISTINCT, or applying string aggregation. Keep your result sets clean and accurate!

Jun 4, 2015 · FROM dbo.Person LEFT JOIN (SELECT MAX(AddressID) AS AddressID, Person FROM dbo.PersonAddress GROUP BY Person) PersonAddress ON Person.ID = …

Aug 22, 2013 · You can pre-process the second table to pre-aggregate your data and join to the result of pre-aggregation.

Apr 19, 2013 · Usually you can use an aggregate function or row_Number function to remove the duplicate. Here is a simplified example - you could do something like that. create table …