Sql e SELECT语句以及何时执行UPDATE语句？如果从未从SELECT语句返回过记录，则会有标记为TRUE的记录。但是，如果在启动SELECT语句和执行UPDATE语句之间插入，会发生什么情况？当记录从未从SELECT语句返回时，将有标记为TRUE的记录

---

e SELECT语句以及何时执行UPDATE语句？如果从未从SELECT语句返回过记录，则会有标记为TRUE的记录。但是，如果在启动SELECT语句和执行UPDATE语句之间插入，会发生什么情况？当记录从未从SELECT语句返回时，将有标记为TRUE的记录。

SELECT  *
FROM    pro_Profile p 
        INNER JOIN pro_Email e ON p.profileID = e.profileID
        INNER JOIN mod_userStatus m ON p.profileID = m.profileID 
        <!--- Joins the pro staff profiles to the employment app ---> 
        INNER JOIN mod_employmentAppJobTitles a ON p.profileID = a.departmentID
         <!--- Join Job titles to the jobs ---> 
        INNER JOIN mod_employmentAppJobs b ON a.jobTitleID=b.jobTitleID
        <!--- Joining the table on where the profile equals everything else ---> 
        INNER JOIN mod_employmentAppProfile c ON c.eAppID = b.eAppID 
WHERE   b.emailSent = 'False'

-- Select data into temporary table
declare @result table (jobTitleID int, ...)

INSERT  @result
        (jobTitleID, ...)
SELECT  jobTitleID
FROM    pro_Profile p 
...

-- Update unreadMail flag
update  mod_employmentAppJobs 
set     unreadMail = 'False'
where   jobTitleID in (select jobTitleId from @result)

-- Return result to application
select  jobTitleId, ...
from    @result

CREATE TABLE #tmpTABLE 
(
  EmailAddress varchar(100),
  JobTitle varchar(50),
  JobTitleId bigint 
  ......
)

INSERT INTO #tmpTable
SELECT EmailAddress,JobTitle, ........
    FROM pro_Profile p 
    INNER JOIN pro_Email e 
    ON p.profileID = e.profileID
    INNER JOIN mod_userStatus m 
    ON p.profileID = m.profileID 
    <!--- Joins the pro staff profiles to the employment app ---> 
    INNER JOIN mod_employmentAppJobTitles a
    ON p.profileID = a.departmentID
    INNER JOIN mod_employmentAppJobs b
    <!--- Join Job titles to the jobs ---> 
    ON a.jobTitleID=b.jobTitleID
    <!--- Joining the table on where the profile equals everything else ---> 
    INNER JOIN mod_employmentAppProfile c
    ON c.eAppID = b.eAppID 
    WHERE b.emailSent = 'False'

UPDATE mod_employmentAddJobs
    SET EmailSent="true"
    FROM mod_employmentAppJobs b
      INNER JOIN #tmpTable tmp
    ON b.jobTitleID=tmp.jobTitleID

SELECT * FROM #tmpTable

UPDATE mod_employmentAddJobs
    SET EmailSent="true"
    FROM pro_Profile p 
    INNER JOIN pro_Email e 
    ON p.profileID = e.profileID
    INNER JOIN mod_userStatus m 
    ON p.profileID = m.profileID 
    <!--- Joins the pro staff profiles to the employment app ---> 
    INNER JOIN mod_employmentAppJobTitles a
    ON p.profileID = a.departmentID
    INNER JOIN mod_employmentAppJobs b
    <!--- Join Job titles to the jobs ---> 
    ON a.jobTitleID=b.jobTitleID
    <!--- Joining the table on where the profile equals everything else ---> 
    INNER JOIN mod_employmentAppProfile c
    ON c.eAppID = b.eAppID 
    WHERE b.emailSent = 'False'

    UPDATE mod_employmentAppJobs
    SET emailSent = 'True'