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Apeaksoft Mac Cleaner v.1.0.20 Apeaksoft Mac Cleaner is the best cleaning tool to remove junk files, monitor hardware health, speed up Mac system and more. At first sight you will find Tembo to have been inspired by the original. Tembo v.1.5 Tembo 1.5 offers users with an effective yet beneficial search tool which is designed to make searching (and finding) of files, mail messages, bookmarks, - as easy as possible. Duplicate Files Searcher v.2.0 Duplicate Files Searcher (DFS) is an application for finding and deleting duplicated files on your computer.The most important feature is that the program makes it possible to find duplicates not only within one computer but also among many computers. Java FileTools v.0.3.0 A set of tools written in Java to manipulate files, finding duplicated files into two directories, finding duplicated files in a single directory, finding duplicated files out and in. The following query count those records where quantity field holds duplicate/triplicates (or more) data. INNER JOIN item b ON a.quantity = b.quantity As the same quantity value exists in more than two records, a DISTINCT clause is used.Ĭode: SELECT distinct a.item_code, a.value, a.quantity Here we apply INNER JOIN the table with itself. You can use the following query to get the same result. INNER JOIN temp ON item.quantity= temp.quantity Now the following main query will execute on 'item' and 'temp' tables where the common field is quantity and the result will be as follows: INNER JOIN uses the main table 'item' and a temporary table 'temp' whose data comes from a subquery. To get the above result we have used a query with an INNER JOIN ( INNER JOIN selects all rows from both participating tables as long as there is a match between the columns.) statement. In the image above, values marked with red rectangle exist more than once.Ĭode: SELECT item_code, value, item.quantity Now we want to get the details of those records where quantity field have duplicate/triplicates values. 
Item_code varchar(20), value int(11), quantity int(11) where item_code is the primary key. We have used a table called 'item' to apply the query :
We have discussed how to find duplicate values with INNER JOIN and subquery, INNER JOIN and DISTINCT, and also how to count duplicate values with GROUP BY and HAVING. In this article, we have discussed a query where you can find duplicates, triplicates, quadruplicates (or more) data from a MySQL table. Often, you may want to count the number of duplicate values in a MySQL table. There are many occasions when you need to find duplicate values available in a column of a MySql table.
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