Select user having qualifying data on multiple rows in the wp_usermeta table

👋 Hey there!

Are you struggling to find the user_id that has qualifying data on multiple rows in the wp_usermeta table? 🤔 Don't worry, I'm here to help you out!

First, let's understand the problem. You mentioned that you have a MySQL query, but it's not giving you the desired result. Looking at your query, I see that you're using the AND operator to check for multiple conditions on the same row. However, in your case, the conditions are spread across different rows.

To find a user_id that has all four qualifying values, each in a different row, we need to modify the query. Here's a revised version for you:

SELECT user_id
FROM wp_usermeta
WHERE (meta_key = 'first_name' AND meta_value = '$us_name')
   OR (meta_key = 'yearofpassing' AND meta_value = '$us_yearselect')
   OR (meta_key = 'u_city' AND meta_value = '$us_reg')
   OR (meta_key = 'us_course' AND meta_value = '$us_course')
GROUP BY user_id
HAVING COUNT(DISTINCT meta_key) = 4

Let me break it down for you. We're using the OR operator to check for each condition separately. Then, we're grouping the results by user_id. The HAVING clause ensures that a user_id appears exactly 4 times (one for each condition), by counting the distinct meta_keys.

Now, executing this query should give you the desired user_id that relates to all four rows.

If you're still facing issues, here are a few common problems and their solutions:

1️⃣ Mistyped Column Names: Double-check if the column names (meta_key, meta_value, etc.) in your table match the ones in your query. Pay attention to spelling, capitalization, and any prefixes used.

2️⃣ Empty Result Set: If the query returns an empty result set, make sure there are records in the wp_usermeta table that satisfy all four conditions. You can validate this by running individual queries for each condition.

3️⃣ Dynamic Values: Ensure that your variables ('$us_name', '$us_yearselect', etc.) hold the correct values. You can print them or debug to confirm if they match the data in the table.

Remember, troubleshooting database queries requires careful attention to details, so review your code and data thoroughly.

Now that you have a revised query and troubleshooting tips, go ahead and give it another try! 🚀 If you have any further questions or need additional assistance, feel free to reach out.

Let's conquer this challenge together! 💪✨