I have 3 tables: inventory as table 1, buy_transaction as table 2, and po_data as table 3.
These are the queries I tried:
update vnt_inventory_tab.quantity
set vnt_inventory_tab.quantity = quantity + (SELECT pdt.quantity
FROM vnt_po_data_tab pdt JOIN vnt_buy_trnsctn_tab bt ON pdt.po_no = bt.po_no
WHERE pdt.po_no = :p_po_no)
where VNT_INVENTORY_TAB.CODE = VNT_PO_DATA_TAB.CODE;
It return as table doesn't exist. I'm not sure where I put wrong because when I do the sub-query it returns exactly the number I want to update into the inventory.
Help me pls
Syntax UPDATE statement requires only table-Name (not a specific column like yours) after the keyword update. More details see Oracle docs
Related
I am trying to delete some duplicate records from mysql table but it was not working.
I am taking help of https://www.javatpoint.com/mysql-delete-duplicate-records
If I will try with example database which is given example it was working fine.
But in my table it was not working.
DELETE S1 FROM employee_attendance AS S1 INNER JOIN employee_attendance AS S2 WHERE S1.DbKey < S2.DbKey AND S1.DivisionDbKey = S2.DivisionDbKey AND S1.Date = S2.Date AND S1.Month = S2.Month AND S1.FinancialYearDbKey = S2.FinancialYearDbKey AND S1.EmployeeDbKey = S2.EmployeeDbKey AND S1.Attendance = S2.Attendance AND S1.InTime = S2.InTime AND S1.OutTime = S2.OutTime AND S1.EmployeeDbKey = 6798 AND S1.Month = '05' AND S1.FinancialYearDbKey = 5;
I am getting error
#1205 - Lock wait timeout exceeded; try restarting transaction
I have tried with another example https://www.geeksforgeeks.org/sql-query-to-delete-duplicate-rows/
DELETE FROM employee_attendance WHERE DbKey NOT IN (SELECT MAX(DbKey) FROM employee_attendance WHERE EmployeeDbKey = 6798 AND Month = '05' AND FinancialYearDbKey = '5' GROUP BY DivisionDbKey,Date,Month,FinancialYearDbKey,EmployeeDbKey,Attendance,InTime,OutTime)
I am getting same error.
#1205 - Lock wait timeout exceeded; try restarting transaction
Any suggestion will be appriciated. Thank you.
I personally think this is a bad practice. You should instead make a (empty) duplicate of the table employee_attendance then define a UNIQUE KEY on that new table that will prevent duplicate entries.
Consider these steps:
Create a duplicate table:
CREATE TABLE employee_attendance_new LIKE employee_attendance;
Add UNIQUE INDEX - now, this is just a simple example. You can add or reduce columns to the unique index but make sure that you drop the existing unique index first then only you re-create:
ALTER TABLE employee_attendance_new
ADD UNIQUE INDEX unq_idx(EmployeeDbKey, date, InTime, OutTime);
Insert the data into the new table using INSERT IGNORE..:
INSERT IGNORE INTO employee_attendance_new
SELECT * FROM employee_attendance;
Check and compare both table. If you're satisfied with the result, rename those tables:
RENAME TABLE employee_attendance TO employee_attendance_old;
RENAME TABLE employee_attendance_new TO employee_attendance;
Now you have the new table with no duplicates and the old table for reference or in case there are some data you need from it.
Fiddle example
I have a old table and a new table. what i need is to copy the uuId of the old table to the new Table.
im following some answers from other references but i can`t get the ideal answer.
the closest answer i found is this:
update table1
set table1.uuid =
(select table2.uuid from table2 where table1.itemDescription = table2.itemDescription)
when i execute this query, it only saves the 1st found uuid of the old table to all the entry in the new Table.
Sample Table2 (old table):
uuid|itemDescription
1|item1
2|item2
3|item3
Sample Table1 (new Table):
uuid|itemDescription
Null|item1
Null|item2
Null|item3
Desired Output:
uuid|itemDescription
1|item1
2|item2
3|item3
what happens:
uuid|itemDescription
1|item1
1|item2
1|item3
In SQLite, you must not use the table name in the SET clause:
update table1
set uuid =
(select table2.uuid from table2 where table1.itemDescription = table2.itemDescription);
Try like this :
UPDATE table1
SET table1.uuid = table2.uuid
FROM table2 WHERE table1.itemDescription = table2.itemDescription
No need for subquery, otherwise you need to link item description in outer query also
How to query NOT EXISTS on the same table?
I need to create the select to be able to perform the insert with the results. The idea is to only insert those records that do not exist in the table.
The keys are t1.tie_id = T2.tie_id AND t1.org_id = t2.org_id.
Currently in T1 I have a single record, which should put the remaining records.
SELECT
101 tie_id,
org_id,
tie_org_orden,
tie_org_activo,
tie_org_default
FROM
table1 T1
WHERE
NOT EXISTS (
SELECT
1
FROM
tabla2 T2
WHERE
t1.tie_id = T2.tie_id
AND
t1.org_id = t2.org_id
)
AND
t1.tie_id = 42 and t1.org_id = 181
you can use alias() like in Usage of "aliased" in SQLAlchemy ORM for aliasing the 2nd time you use the table and the WHERE NOT EXITS has sqlalchemy logic eg in Using NOT EXISTS clause in sqlalchemy ORM query
I have the following columns in a SQLite DB.
id,ts,origin,product,bid,ask,nextts
1,2016-10-18 20:20:54.733,SourceA,Dow,1.09812,1.0982,
2,2016-10-18 20:20:55.093,SourceB,Oil,7010.5,7011.5,
3,2016-10-18 20:20:55.149,SourceA,Dow,18159.0,18161.0,
How can I populate the 'next timestamp' column (nextts) with the next timestamp for the same product (ts), from the same source? I've been trying the following, but I can't seem to put a subquery in an UPDATE statement.
UPDATE TEST a SET nextts = (select ts
from TEST b
where b.id> a.id and a.origin = b.origin and a.product = b.product
order by id asc limit 1);
If I call this, I can display it, but I haven't found a way of updating the value yet.
select a.*,
(select ts
from TEST b
where b.id> a.id and a.origin = b.origin and a.product = b.product
order by id asc limit 1) as nextts
from TEST a
order by origin, a.id;
The problem is that you're using table alias for table in UPDATE statement, which is not allowed. You can skip alias from there and use unaliased (but table-name prefixed) reference to its columns (while keeping aliased references for the SELECT), like this:
UPDATE TEST
SET nextts = (
SELECT b.ts
FROM TEST b
WHERE b.id > TEST.id AND
TEST.origin = b.origin AND
TEST.product = b.product
ORDER BY b.id ASC
LIMIT 1
);
Prefixing unaliased column references with the table name is necessary for SQLite to identify that you're referencing to unaliased table. Otherwise the id column whould be understood as the id from the closest[*] possible data source, in which case it's the aliased table (as b alias), while we're interested in the unaliased table, therefore we need to explicitly tell SQLite that.
[*] Closest data source is the one listed in the same query, or parent query, or parent's parent query, etc. SQLite is looking for the first data source (going from inner part to the outside) in the query hierarchy that defines this column.
I've got two un-related (no FK's defined) tables. The first table contains some tasks for which a user may not have access. I need to find all those tasks - in this case, the joined table would contain nulls. How do I get them?
Here's the setup:
TimeData table
- userID
- taskID
- hours
ApprovedTasks table (the one that should contain nulls)
- taskID
- userID
The SQL query would look like this:
select * from TimeData td
left join ApprovedTasks at
on at.taskID = td.taskID and at.userID = td.userID
where at.taskID is null
Any way to pull that off using a LINQ to Entity query?
TIA
Check out... Disjoint Union in LINQ
This should work...
var approvedTaks = from at in ApprovedTasks.Except(
from at2 in ApprovedTasks
where at2.userID == userId and at2.taskID==taskId
select at2)
where at.userID == userId and at.taskID==taskId
select at;
but sorry don't have the database handy to test it.