fetching data from database using user Id

You can do a query like this:

import wixData from 'wix-data';

let userId = < id of user >
wixData.query("attendance")
  .eq("_id", userId)
  .find()
  .then( (results) => {
    if(results.items.length > 0) {
      let items = results.items;
      let item = items[0];
      $w("#name").text = item.name;
      $w("#sub1").text = item.sub1;
      ... set all of your other fields ...
    } else {
      // handle case where no matching items found
    }
  } )
  .catch( (error) => {
    let errorMsg = error.message;
    let code = error.code;
  } );

You might want to set up a table of all of the users, and then when you click on a user it goes to a dynamic page displaying all of their information. Use the Table Index example to see how that's done.

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No, I know about basic coding! I just can't figure out this part. Can you please help me to figure it out please