I have tried to search 2 tags(PostgreSQL, Mysql) on Stackover Flow. But search results are showing every question 2 times like below image.
Whether its a bug? It should not behave like this.
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To be clear it's not showing the questions twice - it's actually showing you the question and then the answers to the question (if there are any). Search returns both questions and answers.
If you want to only include questions in your results, then you can include a filter of
is:question. You can see the Advanced Search options by clicking
Advanced Search Tips:
One is answer and other one is question. If you want to filter further, you can use
is:a in the search bar.
Related help center article: How do I search?
All current answers here missed the simple and honest mistake made: using a comma.
In order to show questions having two tags, just have a space between them, no comma:
This way you'll get only the questions, no answers, in the search results.
By adding a comma (or anything else) you turn this into ordinary search, which returns both questions and answers, as covered by other answers here.