Question

查询：

SELECT  currency,alert_level,side, 
range_start,range_end      FROM   
AESFX_ALERT_CONFIG order by 
Side,Alert_Level

输出

但我想要这样的输出：

我尝试了CASE，但这并没有解决我的问题。

Answer 1

在您的选择

中使用

<form role="form" name="form1" action="Registration" method="post" class="signup-form">
    <div class="form-group">
        <select 
          onchange="document.getElementById('country').value=this.options[this.selectedIndex].text; document.getElementById('idValue').value=this.options[this.selectedIndex].value;">
            <option></option>
            <option value="sl">Sri Lanka</option>
            <option value="jp">Japan</option>
            <option value="en">England</option>
            <option value="kr">Korea</option>
            <option value="us">USA</option>
        </select>
        <input name="country" placeholder="Select Your Country" id="country" onfocus="this.select()" type="text" required>
    </div>
    <div class="col-md-4">
        <select id="city" name="city" class="form-control">
            <option>--Select--</option>
        </select>
        <label id="city1" class="input-group-error form-error"></label>
    </div>
</form>

谓词

请参阅https://dev.mysql.com/doc/refman/5.7/en/group-by-handling.html

MYSQL：将行转换为列

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