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Possible to use select in an update clause


Possible to use select in an update clause

By : user2948694
Date : November 15 2020, 06:54 AM
To fix the issue you can do The exists will give you TRUE if WaterRevPropInfo has at least 1 row, regardless of what you put in the select. I think you need to do something like this:
code :
UPDATE WaterRevPropInfo
SET    StreetDir = ISNULL(LTRIM(RIGHT(RTRIM(StreetNum), LEN(StreetNum) + 1 - (PATINDEX --Identifies first instance of a numeric char
       ('%[0-9]%', StreetNum) + PATINDEX                                               --Identifies first instance of a non-numeric char
       ('%[^0-9]%', SUBSTRING                                                          --that follows the first numeric char
       (StreetNum, PATINDEX ('%[0-9]%', StreetNum), LEN(StreetNum)) + ' ' ) ) + 1 ) ), StreetDir)


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SELECT clause then update the data

SELECT clause then update the data


By : ObsoleteATM
Date : March 29 2020, 07:55 AM
it should still fix some issue Table : Employee AND Application , You need a correlated subquery:
code :
UPDATE FROM EMPLOYEE E
    SET E.SALARY = E.SALARY*1.10
    WHERE NOT EXISTS (SELECT 1 FROM APPLICATION A WHERE A.NAME = E.NAME);
update select same where clause update subset of records

update select same where clause update subset of records


By : user2903347
Date : March 29 2020, 07:55 AM
wish of those help I have a query, when I run it as a select I get 1014 records. When I run it as an update it updates a varying number of the records usually less than 5. , Why don't you just use a while loop to update them all?
SELECT
Sqlite Update Select query -- Referencing table being updated in Order By clause of inner Select

Sqlite Update Select query -- Referencing table being updated in Order By clause of inner Select


By : Steven Kok
Date : March 29 2020, 07:55 AM
I hope this helps . I am trying to update values in a table by the result of a select query. The problem is that I am not allowed to reference the outermost table (the table being updated) in the Order By clause of the innermost table (the table to select the new value). , If instead of
code :
UPDATE test 
SET New = (
    SELECT innerTable.Old 
    FROM test innerTable 
    WHERE innerTable.Old != test.Old 
        AND innerTable.MustMatch = test.MustMatch 
    ORDER BY innerTable.PreferredMatch = test.PreferredMatch DESC 
    LIMIT 1
) WHERE Old = "Old blue";
UPDATE test 
SET New = (SELECT newValue FROM
    (SELECT innerTable.Old as newValue,
            innerTable.PreferredMatch = test.PreferredMatch as pick
    FROM test innerTable 
    WHERE innerTable.Old != test.Old 
        AND innerTable.MustMatch = test.MustMatch 
    ORDER BY pick DESC 
    LIMIT 1) foo
) WHERE Old = "Old blue";
Update query with select and where clause

Update query with select and where clause


By : awnish3
Date : March 29 2020, 07:55 AM
Hope that helps Consider saving your aggregate query in a separate query and then use the domain aggregate, DLookUp() in the update query. In MS Access SQL (unlike other dialects), update queries must maintain the updateable condition (or non read-only) which rules out use of aggregate queries.
SELECT query (no ProjectPhases join)
code :
SELECT meet.PhaseId, MAX(asgn.RealEndDate) AS MaxRealEndDate 
FROM Assignments AS asgn 
INNER JOIN Meetings AS meet 
ON asgn.MeetingId = meet.MeetingId 
WHERE asgn.RealEndDate IS NOT NULL
GROUP BY meet.PhaseId
UPDATE ProjectPhases p
SET p.RealEndDate = DLookUp("MaxRealEndDate", "myaggQuery", "PhaseId=" & p.PhaseId)
UPDATE ProjectPhases p
SET p.RealEndDate = DMax("RealEndDate", "Assignments", "MeetingId=" & 
                         DLookUp("MeetingId", "Meetings", "PhaseId=" & p.PhaseId) &
                         " AND RealEndDate IS NOT NULL")
using value of select statement in where clause of update, within if/else

using value of select statement in where clause of update, within if/else


By : Frank Riede
Date : March 29 2020, 07:55 AM
it should still fix some issue I've refactored this script to use a select statement first to see if records exist in a certain table.
code :
$content = $_POST['page_content'];
$panelID = $_POST['panel_type'];
$pageID = $_POST['page_id'];

$checkIfExists = "SELECT COUNT(*) AS count, cont_id as existingContent FROM 
 panels WHERE panel_type_id = $panelID AND page_id = $pageID";

$existingContent = $mysqlConn->query($checkIfExists);

// You had an error in your IF statement you have used (=) instead of (==)
if($existingContent->count == 0){
     //working insert
else{
    $updateContent = "
    UPDATE content
        SET content = '$content'
        WHERE id = $existingContent->existingContent
 }
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