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Tag specific date_stamp from mysql_result


ChenXiu
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Displaying date records in an HTML table from a "select datetime" mySQL query makes a HUGE page.

<tr><td>2021-08-15 07:12:03</td></tr>
<tr><td>2021-11-09 14:38:06</td></tr>
<tr><td>2020-12-10 13:37:35</td></tr>
<tr><td>2020-10-29 14:52:45</td></tr>
<tr><td>2020-11-21 01:56:32</td></tr>
<tr><td>2020-07-18 09:23:53</td></tr> // I would use <tr><td id="tagged">2020-07-18 09:23:53</td></tr>
<tr><td>2020-05-15 08:09:35</td></tr>
<tr><td>2020-04-07 12:17:05</td></tr>
        |
(thousand more lines)

Jump to desired month?
When page loads, I can use a <select> input and a "<body onLoad...scrollIntoView>" javascript to "jump" down to a date range.
For example, if I want the page to jump to "records starting with July 2020," I would want to jump to the "2020-07-18" line above.

When using while($row = mysqli_fetch_array($result)), Is there an easy/efficient way for mySQL to "tag" the row where July 2020 starts?

Thank you.

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I know. But I don't know how to do that, other than with a bunch of complicated string manipulation:

$query = "SELECT datetime FROM myTable order by datetime desc;";
$result = mysqli_query($db,$query);
if($result->num_rows == 0) {
echo 'No Data Found';
} else {

while($row = mysqli_fetch_array($result)) {

// The tagged row should be: 2020-07-18 09:23:53
// Therefore, "anything after 2020-06-30 ***"

echo '<tr><td>'.$row["datetime"].'</td></tr>';

}

All I know how to do is convoluted "if (substr($row["datetime"]......." manipulations. It is a mess. There must be a mysql trick. Or a complicated extra mysql query like

$queries = "SELECT * FROM datetime where datetime between '2020-07-01' and last_day('2020-07-01') order by datetime asc";

And use substr to capture the first row

And the use an "if next row == captured aforementioned substr, then tag the row"

Any thoughts?

Thank you.

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Posted (edited)

Table consists of the past 1000 dates.
To put an id tag in the first table row on-or-after July 1, 2020, I have to use 2 mySQL queries.
There has to be a more efficent way of doing the following:
 

$search = $db->query( "select datetime from myTable where datetime > last_day('2020-06-01') order by datetime asc limit 1" )->fetch_assoc();
if (isset($search)) {
  $tag = $search["datetime"];
  $mainQuery = $db->query("SELECT datetime FROM myTable order by datetime desc");
    if (isset($mainQuery)) {
      while($row = $mainQuery->fetch_assoc()) {
        if($row["datetime"] == $tag) {
        echo '<tr><td id="tag">' . $row["datetime"] . '</td></tr>';
        } else {
        echo '<tr><td>' . $row["datetime"] . '</td></tr>'."\n";
      }
    }
  }
}

Thank you.

Edited by ChenXiu
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