Question

这是一个sql查询尝试在MySql数据库表中join两个不同的表，用于为单个用户提取PR_Cod和PR_Cod的值：

SELECT
    CA.theDate,
    CA.theHour,
    CA.TheUSerCode,
    A.PR_Cod,
    A.PR_Name
FROM
    tblUserRegistered CA
JOIN tblUserAreaGlobal A ON A.TheUSerCode = CA.TheUSerCode
WHERE
    theDate BETWEEN DATE_SUB('2015-11-16', INTERVAL 1 DAY)
AND '2015-11-16'
AND (
    HOUR (theHour) >= '15:00:00'
    OR HOUR (theHour) <= '03:00:00'
)
AND A.PR_Cod IN ('058')
ORDER BY
    CA.TheUSerCode,
    CA.theDate,
    CA.theHour;

+------------+----------+-------------+--------+---------+
| theDate    | theHour  | TheUSerCode | PR_Cod | PR_Name |
+------------+----------+-------------+--------+---------+
| 2015-11-16 | 21:30:37 | EU4012111   | 058    | XXX1    |
| 2015-11-16 | 22:21:29 | EU4012111   | 058    | XXX1    |
| 2015-11-16 | 15:15:00 | EU4046905   | 058    | XXX1    |
+------------+----------+-------------+--------+---------+
3 rows in set

现在我需要在第一个表Value上的字段Text和tblUserRegistered上更新这三行。

我尝试过这个update join查询：

UPDATE tblUserRegistered AS target
INNER JOIN (
SELECT
    CA.theDate,
    CA.theHour,
    CA.TheUSerCode,
    A.PR_Cod,
    A.PR_Name
FROM
    tblUserRegistered CA
JOIN tblUserAreaGlobal A ON A.TheUSerCode = CA.TheUSerCode
WHERE
    theDate BETWEEN DATE_SUB('2015-11-16', INTERVAL 1 DAY)
AND '2015-11-16'
AND (
    HOUR (theHour) >= '15:00:00'
    OR HOUR (theHour) <= '03:00:00'
)
AND A.PR_Cod IN ('058')
ORDER BY
    CA.TheUSerCode,
    CA.theDate,
    CA.theHour) AS source ON source.TheUSerCode = target.TheUSerCode
SET target.Value = 1,
 target.Text = 'Y';

但是在输出中我没有更新只有第一行查询提取三行但更多一行：

+------------+----------+-------------+-------+------+
| theDate    | theHour  | TheUSerCode | Value | Text |
+------------+----------+-------------+-------+------+
| 2015-11-16 | 22:21:29 | EU4012111   |     1 | Y    |
| 2015-11-16 | 21:30:37 | EU4012111   |     1 | Y    |
| 2015-11-16 | 15:15:00 | EU4046905   |     1 | Y    |
| 2015-11-16 | 04:22:13 | EU4046905   |     1 | Y    |
+------------+----------+-------------+-------+------+
4 rows in set

为什么查询会以小时04:22:13更新行？

我尝试过：

UPDATE tblUserRegistered AS target
INNER JOIN (
SELECT
    CA.theDate,
    CA.theHour,
    CA.TheUSerCode,
    A.PR_Cod,
    A.PR_Name
FROM
    tblUserRegistered CA
JOIN tblUserAreaGlobal A ON A.TheUSerCode = CA.TheUSerCode
WHERE
    theDate BETWEEN DATE_SUB('2015-11-16', INTERVAL 1 DAY)
AND '2015-11-16'
AND (
    HOUR (theHour) >= '15:00:00'
    OR HOUR (theHour) <= '03:00:00'
)
AND A.PR_Cod IN ('058')
ORDER BY
    CA.TheUSerCode,
    CA.theDate,
    CA.theHour) AS source ON source.TheUSerCode = target.TheUSerCode
SET target.Value = 1,
 target.Text = 'Y'
    WHERE
        target.theDate BETWEEN DATE_SUB('2015-11-16', INTERVAL 1 DAY)
    AND '2015-11-16'
    AND (
        HOUR (target.theHour) >= '15:00:00'
        OR HOUR (target.theHour) <= '03:00:00'
    )
    AND source.PR_Cod IN ('058');

但是在这种情况下我有错误：

[Err] 1292 - Truncated incorrect DOUBLE value: '15:00:00'

请帮帮我，非常感谢你。

Answer 1

您自己很复杂，只需查询并使用UPDATE语法

即可

public List<PlainBrgMetric> GetPlainBrgMetricProgram(long programLOBID) 
{
    var query = _context.metrics.Join(_context.universals,
                                  m => m.metricID,
                                  u => u.orderByAsc,
                                 (metric, universal) => new PlainBrgMetric
                                 {
                                     //Populate the object properties
                                     ...
                                 }).ToList();
    return query;
}

关于连接错误1292的MySQL查询更新

1 个答案: