Im trying to change some records in my database but sadly my sql knowledge is a bit limited. After googling and reading stuff online I have managed to write a select statement in which i can find the records that I want to update but i dont understand the logic to write the update statement to do it. I have to make several similar update statements so I hope this one I can figure out the rest myself
This is the select statement I have:
SELECT
MG.id,
MG.status,
MG.fin,
MG.execDateTime,
EXISTS
(
SELECT 1
FROM Mtask T
JOIN MTaskHis TH ON TH.t_id= T.id
WHERE T.tg_id = MG.id
AND YEAR(TH.dateTime) = 2019
) AS hasExecStart,
NMG.id,
NMG.execDateTime,
EXISTS
(
SELECT 1
FROM Mtask T
JOIN MTaskHis TH ON TH.t_id = T.id
WHERE T.tg_id = NMG.id
AND YEAR(TH.dateTime) = 2019
) AS hasExecNext
FROM Management_Group MG
JOIN MT_Groupman MTGM ON
MG.tgm_id = MTGM.id
LEFT JOIN Management_Group NMG ON MTGM.id =
NMG.tgm_id AND YEAR(NMG.execDateTime) = 2019
JOIN Management_Man MM ON MTGM.man_id = MM.id
JOIN Location L ON MM.location_id = L.id
WHERE L.org_id = 69
AND MG.stat != 'DELETED'
AND YEAR(MG.execDateTime) = 2018
AND MM.Type= 9
AND MG.fin != 1
AND EXISTS
(
SELECT 1
FROM Mtask T
WHERE T.tg_id = MG.id
AND T.stat = 'execution'
)
HAVING hasExecNext = 0 AND hasExecStart = 1
I know standard updates in sql:
UPDATE <TABLENAME>
SET <fieldName> = <value>
WHERE <conditons>
Except I do not know how to convert this select statement I have made into an update statement, reason for that is:
- Where do I put the exist alias in the update statement
- I also dont understand when or where to put all the JOINS in the from statement
- What about the HAVING
What is the best way to do joined updates like this?
In an UPDATE you can join the table you want to update to a sub-query that contains your current query.
UPDATE YourTable t
JOIN
(
<< add your query here >>
) q ON q.SomeKeyField = t.SomeKeyField
SET t.FieldName = q.FieldNameFromSubquery,
t.OtherFieldName = q.OtherFieldNameFromSubquery
I have this query:
SELECT `y78f2_students`.`firstname` , `y78f2_students`.`lastName` , `y78f2_students`.`student_id`,`y78f2_attendance`.`is_present`, `y78f2_attendance`.`note`, `y78f2_attendance`.`thedate`
FROM `y78f2_students`
INNER JOIN `y78f2_enrolls` ON `y78f2_enrolls`.`student_id` = `y78f2_students`.`student_id`
INNER JOIN `y78f2_attendance` ON `y78f2_attendance`.`student_id` = `y78f2_students`.`student_id`
WHERE `y78f2_enrolls`.`term` = 'Term 2 2016'
AND `y78f2_enrolls`.`crn_class` = 'Math1R1'
and `y78f2_attendance`.`thedate` = '2016-01-24'
ORDER BY thedate desc
This query returns only the rows where the date is '2016-01-24'. Currently that is just one row: http://i.imgur.com/jRTBqQ0.png
I need to show all rows where term = 'Term 2 2016' and crn_class` = 'Math1R1' and also where the date is not set as yet. In order words I want to show all students in the class and if the date is not set for these students yet, it will show null.
This is what I would like: http://i.imgur.com/jmsuSF5.png
So in summary I need to show rows where the clause is met and those where the date would be null or not exist yet.
How can I write this query?
Try moving the conditions related to the joined tables from the end of the query, up to the table's respective ON clause for each join. Also, if you would like to return records for which no row yet exists in the y78f2_attendance table, that table should be LEFT OUTER joined, not INNER joined.
SELECT `y78f2_students`.`firstname` , `y78f2_students`.`lastName`,
`y78f2_students`.`student_id`,`y78f2_attendance`.`is_present`,
`y78f2_attendance`.`note`, `y78f2_attendance`.`thedate`
FROM `y78f2_students`
INNER JOIN `y78f2_enrolls` ON
`y78f2_enrolls`.`student_id` = `y78f2_students`.`student_id`
AND `y78f2_enrolls`.`crn_class` = 'Math1R1'
LEFT OUTER JOIN `y78f2_attendance` ON
`y78f2_attendance`.`student_id` = `y78f2_students`.`student_id`
AND (`y78f2_attendance`.`thedate` IS NULL OR `y78f2_attendance`.`thedate` = '2016-01-24')
WHERE `y78f2_enrolls`.`term` = 'Term 2 2016'
ORDER BY thedate desc
I want to run some updates on my MySQL database. Here is the query that I want to use:
UPDATE `wphh_wp_eStore_tbl`
SET `wphh_wp_eStore_tbl`.description = '<div class="dwrp">
<h2>F. Locker $109.99</h2>
<h2>Nike Outlet $109.99</h2>
<h2>Ch. Sports $107.99</h2>
<h2>Hoopers Hookup $89.99</h2>
<h2 class="special">These prices as of 11/20/13</h2>'
WHERE `wphh_wp_eStore_tbl`.id in (
SELECT `wphh_wp_eStore_tbl`.id FROM `wphh_wp_eStore_tbl`
INNER JOIN `wphh_wp_eStore_cat_prod_rel_tbl`
on `wphh_wp_eStore_cat_prod_rel_tbl`.prod_id = `wphh_wp_eStore_tbl`.id
WHERE `wphh_wp_eStore_cat_prod_rel_tbl`.cat_id = 5
)
This generates the following error:
#1093 - You can't specify target table 'wphh_wp_eStore_tbl' for update in FROM clause
Why? I know in MSSQL I can do this:
Update tableone
set columnname = 'xxx'
where id in (
select id
from tableone
where category = 10)
and it works.
What am I missing?
The simple solution is to enclose the in list in an additional level of nesting. MySQL will then materialize the data:
UPDATE `wphh_wp_eStore_tbl`
SET `wphh_wp_eStore_tbl`.description = '<div class="dwrp">
<h2>F. Locker $109.99</h2>
<h2>Nike Outlet $109.99</h2>
<h2>Ch. Sports $107.99</h2>
<h2>Hoopers Hookup $89.99</h2>
<h2 class="special">These prices as of 11/20/13</h2>'
WHERE `wphh_wp_eStore_tbl`.id in (
select * from (SELECT `wphh_wp_eStore_tbl`.id FROM `wphh_wp_eStore_tbl`
INNER JOIN `wphh_wp_eStore_cat_prod_rel_tbl` on `wphh_wp_eStore_cat_prod_rel_tbl`.prod_id = `wphh_wp_eStore_tbl`.id
WHERE
`wphh_wp_eStore_cat_prod_rel_tbl`.cat_id = 5) t
)
Another way is to use join to with update.
I'm not a MySQL guy but could you do this instead? I also like using table alias with these ugly names.
UPDATE `wphh_wp_eStore_tbl` e
inner join `wphh_wp_eStore_cat_prod_rel_tbl` ecpr
on ecpr.prod_id = e.id
and ecpr.cat_id = 5
set e.description = 'Some Text To Update With'
In SQL Server the "from" and the join come after the SET but.. not the case in mySQL apparently.
I have a problem with updating records in my table. I am doing research all day but it is just beyond me.
Basics: I have two tables
TABLE1
TABLE2
I need to update nr_g from TABLE1 with id from TABLE2 but only where 'kraj' 'region' 'nazwa_hotelu' from TABLE1 is equal 'country' 'region' 'hotelName' from TABLE2
my trying so far:
UPDATE merlinx u
LEFT JOIN
merlinx_new s ON u.nr_g != s.id
SET
u.nr_g = s.id
WHERE
u.kraj = s.country AND u.nazwa_hotelu = s.hotelName AND u.region = s.region
That is updating me only 4 rows... and 1592 are unsafe statements
another shot of mine:
UPDATE merlinx_merged
SET
nr_g = (SELECT
merlinx_new.id
FROM
merlinx_new
INNER JOIN
merlinx_merged
WHERE
merlinx_new.country = merlinx_merged.kraj
AND merlinx_new.hotelName = merlinx_merged.nazwa_hotelu
AND merlinx_new.region = merlinx_merged.region)
And that is just throwing errors.
My mind is fried after 8 hours wasted on it. Help is much appreciated.
I think your issue is in your join statement. You have
LEFT JOIN merlinx_new s ON u.nr_g != s.id
You shouldn't have to have the ON criteria in that (if I'm understanding your question correctly).
This should do the trick if you want to overwrite merlinx.nr_g with the value from merlinx_new.id if all of your criteria matches in the WHERE clause.
UPDATE merlinx u, merlinx_new s
SET u.nr_g = s.id
WHERE u.kraj = s.country AND u.nazwa_hotelu = s.hotelName AND u.region = s.region
I need to check (from the same table) if there is an association between two events based on date-time.
One set of data will contain the ending date-time of certain events and the other set of data will contain the starting date-time for other events.
If the first event completes before the second event then I would like to link them up.
What I have so far is:
SELECT name as name_A, date-time as end_DTS, id as id_A
FROM tableA WHERE criteria = 1
SELECT name as name_B, date-time as start_DTS, id as id_B
FROM tableA WHERE criteria = 2
Then I join them:
SELECT name_A, name_B, id_A, id_B,
if(start_DTS > end_DTS,'VALID','') as validation_check
FROM tableA
LEFT JOIN tableB ON name_A = name_B
Can I then, based on my validation_check field, run a UPDATE query with the SELECT nested?
You can actually do this one of two ways:
MySQL update join syntax:
UPDATE tableA a
INNER JOIN tableB b ON a.name_a = b.name_b
SET validation_check = if(start_dts > end_dts, 'VALID', '')
-- where clause can go here
ANSI SQL syntax:
UPDATE tableA SET validation_check =
(SELECT if(start_DTS > end_DTS, 'VALID', '') AS validation_check
FROM tableA
INNER JOIN tableB ON name_A = name_B
WHERE id_A = tableA.id_A)
Pick whichever one seems most natural to you.
UPDATE
`table1` AS `dest`,
(
SELECT
*
FROM
`table2`
WHERE
`id` = x
) AS `src`
SET
`dest`.`col1` = `src`.`col1`
WHERE
`dest`.`id` = x
;
Hope this works for you.
Easy in MySQL:
UPDATE users AS U1, users AS U2
SET U1.name_one = U2.name_colX
WHERE U2.user_id = U1.user_id
If somebody is seeking to update data from one database to another no matter which table they are targeting, there must be some criteria to do it.
This one is better and clean for all levels:
UPDATE dbname1.content targetTable
LEFT JOIN dbname2.someothertable sourceTable ON
targetTable.compare_field= sourceTable.compare_field
SET
targetTable.col1 = sourceTable.cola,
targetTable.col2 = sourceTable.colb,
targetTable.col3 = sourceTable.colc,
targetTable.col4 = sourceTable.cold
Traaa! It works great!
With the above understanding, you can modify the set fields and "on" criteria to do your work. You can also perform the checks, then pull the data into the temp table(s) and then run the update using the above syntax replacing your table and column names.
Hope it works, if not let me know. I will write an exact query for you.
UPDATE
receipt_invoices dest,
(
SELECT
`receipt_id`,
CAST((net * 100) / 112 AS DECIMAL (11, 2)) witoutvat
FROM
receipt
WHERE CAST((net * 100) / 112 AS DECIMAL (11, 2)) != total
AND vat_percentage = 12
) src
SET
dest.price = src.witoutvat,
dest.amount = src.witoutvat
WHERE col_tobefixed = 1
AND dest.`receipt_id` = src.receipt_id ;
Hope this will help you in a case where you have to match and update between two tables.
I found this question in looking for my own solution to a very complex join. This is an alternative solution, to a more complex version of the problem, which I thought might be useful.
I needed to populate the product_id field in the activities table, where activities are numbered in a unit, and units are numbered in a level (identified using a string ??N), such that one can identify activities using an SKU ie L1U1A1. Those SKUs are then stored in a different table.
I identified the following to get a list of activity_id vs product_id:-
SELECT a.activity_id, w.product_id
FROM activities a
JOIN units USING(unit_id)
JOIN product_types USING(product_type_id)
JOIN web_products w
ON sku=CONCAT('L',SUBSTR(product_type_code,3), 'U',unit_index, 'A',activity_index)
I found that that was too complex to incorporate into a SELECT within mysql, so I created a temporary table, and joined that with the update statement:-
CREATE TEMPORARY TABLE activity_product_ids AS (<the above select statement>);
UPDATE activities a
JOIN activity_product_ids b
ON a.activity_id=b.activity_id
SET a.product_id=b.product_id;
I hope someone finds this useful
UPDATE [table_name] AS T1,
(SELECT [column_name]
FROM [table_name]
WHERE [column_name] = [value]) AS T2
SET T1.[column_name]=T2.[column_name] + 1
WHERE T1.[column_name] = [value];
You can update values from another table using inner join like this
UPDATE [table1_name] AS t1 INNER JOIN [table2_name] AS t2 ON t1.column1_name] = t2.[column1_name] SET t1.[column2_name] = t2.column2_name];
Follow here to know how to use this query http://www.voidtricks.com/mysql-inner-join-update/
or you can use select as subquery to do this
UPDATE [table_name] SET [column_name] = (SELECT [column_name] FROM [table_name] WHERE [column_name] = [value]) WHERE [column_name] = [value];
query explained in details here http://www.voidtricks.com/mysql-update-from-select/
You can use:
UPDATE Station AS st1, StationOld AS st2
SET st1.already_used = 1
WHERE st1.code = st2.code
For same table,
UPDATE PHA_BILL_SEGMENT AS PHA,
(SELECT BILL_ID, COUNT(REGISTRATION_NUMBER) AS REG
FROM PHA_BILL_SEGMENT
GROUP BY REGISTRATION_NUMBER, BILL_DATE, BILL_AMOUNT
HAVING REG > 1) T
SET PHA.BILL_DATE = PHA.BILL_DATE + 2
WHERE PHA.BILL_ID = T.BILL_ID;
I had an issue with duplicate entries in one table itself. Below is the approaches were working for me. It has also been advocated by #sibaz.
Finally I solved it using the below queries:
The select query is saved in a temp table
IF OBJECT_ID(N'tempdb..#New_format_donor_temp', N'U') IS NOT NULL
DROP TABLE #New_format_donor_temp;
select *
into #New_format_donor_temp
from DONOR_EMPLOYMENTS
where DONOR_ID IN (
1, 2
)
-- Test New_format_donor_temp
-- SELECT *
-- FROM #New_format_donor_temp;
The temp table is joined in the update query.
UPDATE de
SET STATUS_CD=de_new.STATUS_CD, STATUS_REASON_CD=de_new.STATUS_REASON_CD, TYPE_CD=de_new.TYPE_CD
FROM DONOR_EMPLOYMENTS AS de
INNER JOIN #New_format_donor_temp AS de_new ON de_new.EMP_NO = de.EMP_NO
WHERE
de.DONOR_ID IN (
3, 4
)
I not very experienced with SQL please advise any better approach you know.
Above queries are for MySql server.
if you are updating from a complex query. The best thing is create temporary table from the query, then use the temporary table to update as one query.
DROP TABLE IF EXISTS cash_sales_sums;
CREATE TEMPORARY TABLE cash_sales_sums as
SELECT tbl_cash_sales_documents.batch_key, COUNT(DISTINCT tbl_cash_sales_documents.cash_sale_number) no_of_docs,
SUM(tbl_cash_sales_documents.paid_amount) paid_amount, SUM(A.amount - tbl_cash_sales_documents.bonus_amount - tbl_cash_sales_documents.discount_given) amount,
SUM(A.recs) no_of_entries FROM
tbl_cash_sales_documents
RIGHT JOIN(
SELECT
SUM(
tbl_cash_sales_transactions.amount
)amount,
tbl_cash_sales_transactions.cash_sale_document_id,
COUNT(transaction_id)recs
FROM
tbl_cash_sales_transactions
GROUP BY
tbl_cash_sales_transactions.cash_sale_document_id
)A ON A.cash_sale_document_id = tbl_cash_sales_documents.cash_sale_id
GROUP BY
tbl_cash_sales_documents.batch_key
ORDER BY batch_key;
UPDATE tbl_cash_sales_batches SET control_totals = (SELECT amount FROM cash_sales_sums WHERE cash_sales_sums.batch_key = tbl_cash_sales_batches.batch_key LIMIT 1),
expected_number_of_documents = (SELECT no_of_docs FROM cash_sales_sums WHERE cash_sales_sums.batch_key = tbl_cash_sales_batches.batch_key),
computer_number_of_documents = expected_number_of_documents, computer_total_amount = control_totals
WHERE batch_key IN (SELECT batch_key FROM cash_sales_sums);
INSERT INTO all_table
SELECT Orders.OrderID,
Orders.CustomerID,
Orders.Amount,
Orders.ProductID,
Orders.Date,
Customer.CustomerName,
Customer.Address
FROM Orders
JOIN Customer ON Orders.CustomerID=Customer.CustomerID
WHERE Orders.OrderID not in (SELECT OrderID FROM all_table)