The code is performing a SELECT query to generate a...

November 21, 2023 at 09:45 AM

SELECT GROUP_CONCAT(DISTINCT CONCAT( 'SUM(CASE WHEN criteria.Category_ID = ', criteria.Category_ID, ' THEN scores.Points END) AS ',REPLACE(Category_Description, ' ', '_'), '_',scores.Candidate_ID,' , ROW_NUMBER() OVER (ORDER BY SUM(CASE WHEN criteria.Category_ID = ', criteria.Category_ID, ' THEN scores.Points END) DESC) Row_',REPLACE(Category_Description, ' ', '_'),'_',scores.Candidate_ID ) ) INTO @sql FROM scores INNER JOIN candidate ON scores.Candidate_ID = candidate.Candidate_ID INNER JOIN criteria ON scores.Criteria_ID = criteria.Criteria_ID INNER JOIN category ON criteria.Category_ID = category.Category_ID WHERE candidate.Gender = @s_key;

The code is performing a SELECT query to generate a dynamic SQL statement and store it in the variable @sql.

The query retrieves data from multiple tables (scores, candidate, criteria, and category) using INNER JOINs. It filters the data based on the candidate's gender, which is represented by the variable @s_key.

The GROUP_CONCAT function is used to concatenate multiple strings returned by the CONCAT function. The CONCAT function combines various strings and expressions to create a single string.

The generated SQL statement consists of multiple SUM(CASE WHEN ...) expressions, which calculate the sum of scores based on certain conditions. The conditions involve matching the Category_ID from the criteria table with the Category_ID from the scores table.

The calculated sums are aliased using the CONCAT function to create column aliases that include the Category_Description, Candidate_ID, and other dynamic parts. The REPLACE function is used to replace spaces in the Category_Description with underscores.

Additionally, the ROW_NUMBER function is used to assign a row number to each row based on the descending order of the calculated sums. The row numbers are also included in the column aliases.

Overall, the code is dynamically generating a SQL statement to calculate and alias sums of scores based on various conditions and generate row numbers. The specific result of this query depends on the data in the tables and the value of the @s_key variable.

Generate your own explanations
Download our vscode extension
Read other generated explanations

Built by @thebuilderjr
Sponsored by beam analytics
Read our terms and privacy policy
Forked from openai-quickstart-node