MYSQL |今天和最后日期从表格中获取所有员工的日期

Question

我正在尝试创建一个查询，以获取今天和最后一次约会的所有员工。

我有两列in_date和out_date

所以，如果列in_date和out_date都有记录，我不想获取这些记录。

我想只获取今天和昨天日期的记录，其中设置了in_date但没有设置out_date加上那些甚至没有in_date和out_date记录的记录......

因此，简单来说，它将从出勤表中获取其中未设置in_date和out_date的所有记录。如果两者都设置，那么不要获取记录..

这是我到目前为止的查询，不确定我是否采取了正确的方式..

SELECT 
  `E`.`employee_id` AS EmployeeID,
  `E`.`full_name` AS EmployeeNam,
  `ATT`.`in_date` AS EmployeeInDate,
  `ATT`.`out_date` AS EmployeeOutDate,
  `ATT`.`in_time` AS EmployeeInTime,
  `ATT`.`out_time` AS EmployeeOutTime 
FROM
  (`employee` E) 
  INNER JOIN `employment` ET 
    ON `E`.`employee_id` = `ET`.`employee_id` 
    AND ET.current = 1 
  INNER JOIN `employee_project` EP 
    ON `E`.`employee_id` = `EP`.`employee_id` 
  LEFT JOIN `attendence` ATT 
    ON `ATT`.`employee_id` = `E`.`employee_id`  
  INNER JOIN `posting` P 
    ON `P`.`employement_id` = `ET`.`employment_id` 
    AND P.current = 1 
    AND P.status = 2 
WHERE `E`.`enrolled` = 1 -- AND ATT.`in_date` = CURDATE() - 1 OR ATT.`in_date` = CURDATE()
GROUP BY `E`.`employee_id`

这是我现在得到的记录。

我在

中尝试了这个

AND ATT.`in_date` = CURDATE() - 1 OR ATT.`in_date` = CURDATE()

不确定它是获得今天和昨天日期的正确方法吗？但如果不对，请告诉我们今天和以前的日期是什么样的正确方法。

加上它不会让我记录空日期，我怎么会得到空日期？

注意空： 我想要空的只是如果员工今天没有参加，所以它是空的，那么我想今天空或最后一天如果存在空（不是所有的空记录）

- = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - =

更新 这次我尝试了UNION方式..但是对于NULL，union也会同时使用这些空值吗？那么如何区分null是哪个日期??

SELECT 
  `E`.`employee_id` AS EmployeeID,
  `E`.`full_name` AS EmployeeNam,
  `ATT`.`in_date` AS EmployeeInDate,
  `ATT`.`out_date` AS EmployeeOutDate,
  `ATT`.`in_time` AS EmployeeInTime,
  `ATT`.`out_time` AS EmployeeOutTime 
FROM
  (`employee` E) 
  INNER JOIN `employment` ET 
    ON `E`.`employee_id` = `ET`.`employee_id` 
    AND ET.current = 1 
  INNER JOIN `employee_project` EP 
    ON `E`.`employee_id` = `EP`.`employee_id` 
  LEFT JOIN `attendence` ATT 
    ON `ATT`.`employee_id` = `E`.`employee_id`  AND ATT.`in_date` = CURDATE() - 1 -- Get Yesterdays Records
  INNER JOIN `posting` P 
    ON `P`.`employement_id` = `ET`.`employment_id` 
    AND P.current = 1 
    AND P.status = 2 
WHERE `E`.`enrolled` = 1
GROUP BY `E`.`employee_id` , ATT.in_date
UNION
SELECT 
  `E`.`employee_id` AS EmployeeID,
  `E`.`full_name` AS EmployeeNam,
  `ATT`.`in_date` AS EmployeeInDate,
  `ATT`.`out_date` AS EmployeeOutDate,
  `ATT`.`in_time` AS EmployeeInTime,
  `ATT`.`out_time` AS EmployeeOutTime 
FROM
  (`employee` E) 
  INNER JOIN `employment` ET 
    ON `E`.`employee_id` = `ET`.`employee_id` 
    AND ET.current = 1 
  INNER JOIN `employee_project` EP 
    ON `E`.`employee_id` = `EP`.`employee_id` 
  LEFT JOIN `attendence` ATT 
    ON `ATT`.`employee_id` = `E`.`employee_id` AND ATT.`in_date` = CURDATE() -- Get Todays Dates
  INNER JOIN `posting` P 
    ON `P`.`employement_id` = `ET`.`employment_id` 
    AND P.current = 1 
    AND P.status = 2 
WHERE `E`.`enrolled` = 1
GROUP BY `E`.`employee_id`

Answer 1

你可以在mysql中尝试类似的东西：

WHERE (ATT.in_date BETWEEN DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 1 DAY) AND CURRENT_TIMESTAMP)

DATE_SUB（CURRENT_TIMESTAMP，INTERVAL 1天） - ＆gt;今天约会 - 1天。

看一下这个函数DATE_SUB

我希望它有所帮助。

Answer 2

如果我理解正确的话：

AND ATT.in_date BETWEEN CONCAT(CAST(DATE(CURDATE() - 1) AS CHAR), ' 00:00:00') AND CONCAT(CAST(DATE(CURDATE()) AS CHAR), ' 23:59:59') AND (ATT.out_date IS NULL OR ATT.out_date = '0000-00-00 00:00:00')

应该给你你想要的东西，但它有点乱：p

<强>更新 如果您还想要in_date和out_date为NULL的记录，请尝试这样做：

AND (ATT.in_date BETWEEN CONCAT(CAST(DATE(CURDATE() - 1) AS CHAR), ' 00:00:00') AND CONCAT(CAST(DATE(CURDATE()) AS CHAR), ' 23:59:59') AND (ATT.out_date IS NULL OR ATT.out_date = '0000-00-00 00:00:00')) OR (ATT.in_date IS NULL OR ATT.in_date = '0000-00-00 00:00:00' AND ATT.out_date IS NULL OR ATT.out_date = '0000-00-00 00:00:00')

Answer 3

AND (
      (ATT.`in_date` >= DATE_SUB(CURDATE(), INTERVAL 1 DAY) AND (ATT.`out_date` IS NULL OR ATT.`out_date` = '0000-00-00'))
    OR 
      ((ATT.`in_date` IS NULL OR ATT.`in_date` = '0000-00-00') AND (ATT.`out_date` IS NULL OR ATT.`out_date` = '0000-00-00'))
    )

以上条件应返回以下记录：

• ATT.in_date或者等于或大于昨天的日期（假设您将来没有记录） AND ATT.out_date未设置（NULL或＆＃39; 0000-00-00＆＃39）
• 或
• ATT.in_date未设置（NULL或＆＃39; 0000-00-00＆＃39;） AND ATT.out_date未设置（NULL或＆＃39; 0000-00-00＆＃39;。）