10 Most Popular APIs for Books
The Books category on ProgrammableWeb contains dozens of Application Programming Interface (or API) listings in which developers may use to create applications with book data. These include APIs for libraries, textbooks, book sharing, book reviews, literacy, book printing and publishing, storytelling, photo books and more.
In this article, we highlight the most popular books APIs listed on ProgrammableWeb according to user page views.
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Sometimes you need to delete duplicate rows in a database :)
In the future, set UNIQUE keys when you need them :)
In the example below, we have a table appropriately named TABLE_NAME
and there are multiple rows that have the same value for the duplicate_field
field. In this example, we want to remove the ones where the id
field is set to "remove". In other examples, you can pick any conditional you want when choosing which of the rows to remove or which to keep, including conditionals between them (e.g. foo.id < bar.id
will keep the row with the highest id value and delete the others).
Alternatively, if you do want to add that UNIQUE index, you can do the following to brute force dropping duplicate rows:
ALTER IGNORE TABLE TABLE_NAME
ADD UNIQUE INDEX index_name (duplicate_field);