我有三张桌子.green-circle {
height: 20px;
width: 20px;
background-color: green;
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
/*margin-left: 40px;
margin-right: 40px;*/
/*margin-top: 10px;*/
}。用户可以同时在几个组中。如何在一个声明中获取<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-WskhaSGFgHYWDcbwN70/dfYBj47jz9qbsMId/iRN3ewGhXQFZCSftd1LZCfmhktB" crossorigin="anonymous">
<table id="tblRandomSummary" class="table table-hover table-striped table-bordered table-condensed responsive no-footer dtr-inline dataTable collapsed" role="grid" aria-describedby="tblRandomSummary_info" style="width: 1029px;">
<thead>
<tr role="row">
<th class="sorting_asc" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 47px;" aria-label="Circuit: activate to sort column descending" aria-sort="ascending">Circuit</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 71px;" aria-label="WashType: activate to sort column ascending">WashType</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 115px;" aria-label="AverageDuration: activate to sort column ascending">AverageDuration</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 71px;" aria-label="FirstRinse: activate to sort column ascending">FirstRinse</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 143px;" aria-label="CausticRecirculation: activate to sort column ascending">CausticRecirculation</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 125px;" aria-label="IntermediateRinse: activate to sort column ascending">IntermediateRinse</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 123px;" aria-label="AcidRecirculation: activate to sort column ascending">AcidRecirculation</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 126px;" aria-label="IntermediateRinse: activate to sort column ascending">IntermediateRinse</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 0px; display: none;" aria-label="HeatSterilizeNoPulsing: activate to sort column ascending">HeatSterilizeNoPulsing</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 0px; display: none;" aria-label="HeatSterilizePulsing: activate to sort column ascending">HeatSterilizePulsing</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 0px; display: none;" aria-label="SecondSemiAutoRecirculation: activate to sort column ascending">SecondSemiAutoRecirculation</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 0px; display: none;" aria-label="SanitiserRecirculation: activate to sort column ascending">SanitiserRecirculation</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 0px; display: none;" aria-label="FinalRinse: activate to sort column ascending">FinalRinse</th>
<th class="sorting" tabindex="0" aria-controls="tblRandomSummary" rowspan="1" colspan="1" style="width: 0px; display: none;" aria-label="Idle: activate to sort column ascending">Idle</th>
</tr>
</thead>
<tbody>
<tr role="row" class="odd">
<td tabindex="0" class="sorting_1">Engine001</td>
<td>Acid</td>
<td>3.75 mins</td>
<td>0</td>
<td><div class="green-circle">0</div></td>
<td>0</td>
<td>0</td>
<td>0</td>
<td style="display: none;">0</td>
<td class="red-circle" style="display: none;">4</td>
<td style="display: none;">0</td>
<td style="display: none;">0</td>
<td style="display: none;"></td>
<td style="display: none;">0</td>
</tr>
<tr role="row" class="even">
<td tabindex="0" class="sorting_1">Engine001</td>
<td>SemiAuto</td>
<td>3.75 mins</td>
<td><div class="green-circle">0</div></td>
<td><div class="green-circle">0</div></td>
<td>0</td>
<td>0</td>
<td>0</td>
<td style="display: none;">0</td>
<td class="red-circle" style="display: none;">4</td>
<td style="display: none;">0</td>
<td style="display: none;">0</td>
<td style="display: none;"></td>
<td style="display: none;">0</td>
</tr>
<tr role="row" class="odd">
<td tabindex="0" class="sorting_1">Engine001</td>
<td>SemiAuto & Acid</td>
<td>3.75 mins</td>
<td><div class="green-circle">0</div></td>
<td><div class="green-circle">0</div></td>
<td>0</td>
<td>0</td>
<td>0</td>
<td style="display: none;">0</td>
<td class="red-circle" style="display: none;">4</td>
<td style="display: none;">0</td>
<td style="display: none;">0</td>
<td style="display: none;"></td>
<td style="display: none;">0</td>
</tr>
<tr role="row" class="even">
<td tabindex="0" class="sorting_1">Engine001</td>
<td>No Wash</td>
<td>4.13 mins</td>
<td><div class="green-circle">0</div></td>
<td>0</td>
<td>0</td>
<td>0</td>
<td>0</td>
<td style="display: none;">0</td>
<td class="red-circle" style="display: none;">4</td>
<td style="display: none;">0</td>
<td style="display: none;">0</td>
<td style="display: none;"></td>
<td style="display: none;">0</td>
</tr>
<tr role="row" class="odd">
<td tabindex="0" class="sorting_1">Engine001</td>
<td>Rinse</td>
<td>4.44 mins</td>
<td><div class="green-circle">0</div></td>
<td><div class="green-circle">0</div></td>
<td>0</td>
<td>0</td>
<td>0</td>
<td style="display: none;">0</td>
<td class="red-circle" style="display: none;">4</td>
<td style="display: none;">0</td>
<td style="display: none;">0</td>
<td style="display: none;"></td>
<td style="display: none;">0</td>
</tr>
</tbody>
</table>特定users(id, login), groups(id, name), users_groups(user_id, group_id)？
答案 0 :(得分：-1)
SELECT groups.name
FROM groups
WHERE groups.id in (
SELECT rel.group_id
FROM users_groups rel
WHERE rel.user_id = 'your_user_id'
);