MySQL支持样式查询

Question

我正在尝试为Google柱形图创建一个mysql pivot样式查询。我希望“借记”数据显示在“transDesc”描述下，但它总是显示为0.我对这个平台还是比较新的，所以任何人都可以告诉我，我是否在正确的轨道上？

SELECT
    view_monthly_chart.pay_month, view_monthly_chart.transDesc AS Transaction,
    IF(view_monthly_chart.transDesc = 'Bills', `debit`, 0) AS bills,
    IF(view_monthly_chart.transDesc = 'Misc', `debit`, 0) AS misc,
    IF(view_monthly_chart.transDesc = 'Inc', `debit`, 0) AS inc,
    IF(view_monthly_chart.transDesc = 'Bank Trans', `debit`, 0) AS bank_trans
FROM view_monthly_chart 
GROUP BY view_monthly_chart.pay_month, view_monthly_chart.transDesc
ORDER BY view_monthly_chart.pay_id DESC

查询基于视图：

select `t1`.`pay_id` AS `pay_id`,`t3`.`pay_month` AS `pay_month`,`t2`.`Desc` AS `transDesc`,floor(sum(`t1`.`debit`)) AS `debit` 
from ((`transactions`.`tbltransaction` `t1` 
    left join `transactions`.`tbltransid` `t2` 
    on((`t1`.`trans_id` = `t2`.`id`))) 
    left join `transactions`.`tblpayid` `t3` 
    on((`t1`.`pay_id` = `t3`.`pay_id`))) 
where (`t2`.`Desc` is not null) 
group by `t1`.`pay_id`,`t3`.`pay_month`,`t2`.`Desc` 
order by `t1`.`pay_id` desc limit 24

Answer 1

在# coding: utf8 import json import re import textwrap from flask import Flask from flask import request app = Flask(__name__) text_color_in_chat = "#000000" @app.route('/') def hello_world(): content = textwrap.dedent("""\ <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script> <script type="text/javascript" charset="utf-8"> function change_color(t) { var url = "/route/to/change_color"; var data = {color: $('#chat-color').val()}; $.post(url, data); } </script> <div> Check your color in chat: <input id="chat-color" type="color" value="<color>" onchange="change_color(this);"> </div> """) return content.replace("<color>", text_color_in_chat) @app.route('/route/to/change_color', methods=['POST']) def change_color(): new_color = request.form['color'] if re.match(r'^#[0-9a-f]{6,6}$', new_color): global text_color_in_chat text_color_in_chat = new_color return json.dumps({'change_color': "OK"}) return json.dumps({'change_color': "Invalid color"}) if __name__ == '__main__': app.run(debug=True) 语句中执行控制结构的ANSI SQL方法是使用SELECT

这就是：

CASE WHEN … THEN … ELSE … END