[Solved] SQL statement thinking non distinct [closed]

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Introduction

SQL statement thinking is a process of understanding how to use SQL to solve a problem. It involves understanding the structure of the data, the relationships between the data, and the logic of the query. It is important to think through the SQL statement before writing it, as it can save time and effort in the long run. This post will discuss the concept of thinking through a SQL statement, with a focus on the use of the DISTINCT keyword.

Solution

SELECT DISTINCT column_name
FROM table_name;


A simple GROUP BY should work for you:

SELECT Col1,Col2
FROM YourTable T
GROUP BY Col1,Col2
HAVING COUNT(*) > 1

Please post what you have tried going forward…

–EDIT–

If you’re look at returning all rows that have the same lat/lon, then something like this would work:

SELECT *
FROM YourTable
WHERE (lat,lon) IN (
      SELECT lat,lon
      FROM YourTable
      GROUP BY lat,lon
      HAVING COUNT(*) > 1
)

http://sqlfiddle.com/#!2/f9658/5

7

solved SQL statement thinking non distinct [closed]


When it comes to writing a SQL statement that does not return distinct values, there are a few things to consider. First, you need to make sure that the query is written correctly. This means that you should use the correct syntax and that all of the tables and columns are properly referenced. Additionally, you should make sure that the query is optimized for performance. This means that you should use the appropriate indexes and that the query is written in the most efficient way possible.

Once you have written the query, you need to make sure that it is returning the correct results. This means that you should check the results against the expected results. If the results are not what you expected, then you should look into why the query is not returning the expected results. This could be due to incorrect syntax, incorrect data, or incorrect indexes.

Finally, you should make sure that the query is returning distinct values. This means that you should use the DISTINCT keyword in the query. This keyword will ensure that the query only returns unique values. Additionally, you should make sure that the query is not returning duplicate values. This can be done by using the GROUP BY clause in the query.

By following these steps, you can ensure that your SQL statement is returning the correct results and that it is returning distinct values. This will help to ensure that your query is optimized for performance and that it is returning the expected results.