I have a table called StencilStorage and it has fields that look like this.
What I am trying to accomplish is creating a stored procedure that will update the table and set PCB_ID equal to some irrelevant number wherever the next available slot is, sorting the table from low->high by UNIQID. I have the following so far. The next available slot is labeled as 0 as shown in row 5 in the table above.
CREATE PROCEDURE sp_insert_to_storage
(
#PCB_ID integer
)
AS
BEGIN
UPDATE Tooling.StencilStorage
SET PCB_ID = #PCB_ID
WHERE
GO;
Any help is very much appreciated.
CREATE PROCEDURE sp_insert_to_storage
(
#PCB_ID integer
)
AS
BEGIN
UPDATE Tooling.StencilStorage
SET PCB_ID = #PCB_ID
WHERE UNIQID = (SELECT TOP 1 UNIQID FROM Tooling.StencilStorage WHERE PCB_ID = 0 ORDER BY UNIQID)
GO;
Related
I have something like the table below:
CREATE TABLE updates (
id INT PRIMARY KEY IDENTITY (1, 1),
name VARCHAR (50) NOT NULL,
updated DATETIME
);
And I'm updating it like so:
INSERT INTO updates (name, updated)
VALUES
('fred', '2020-11-11),
('fred', '2020-11-11'),
...
('bert', '2020-11-11');
I need to write an after update Trigger and enumerate all the name(s) that were added and add each one to another table but can't work out how enumerate each one.
EDIT: - thanks to those who pointed me in the right direction, I know very little SQL.
What I need to do is something like this
foreach name in inserted
look it up in another table and
retrieve a count of the updates a 'name' has done
add 1 to the count
and update it back into the other table
I can't get to my laptop at the moment, but presumably I can do something like:
BEGIN
SET #count = (SELECT UCount from OTHERTAB WHERE name = ins.name)
SET #count = #count + 1
UPDATE OTHERTAB SET UCount = #count WHERE name = ins.name
SELECT ins.name
FROM inserted ins;
END
and that would work for each name in the update?
Obviously I'll have to read up on set based SQL processing.
Thanks all for the help and pointers.
Based on your edits you would do something like the following... set based is a mindset, so you don't need to compute the count in advance (in fact you can't). It's not clear whether you are counting in the same table or another table - but I'm sure you can work it out.
Points:
Use the Inserted table to determine what rows to update
Use a sub-query to calculate the new value if its a second table, taking into account the possibility of null
If you are really using the same table, then this should work
BEGIN
UPDATE OTHERTAB SET
UCount = COALESCE(UCount,0) + 1
WHERE [name] in (
SELECT I.[name]
FROM Inserted I
);
END;
If however you are using a second table then this should work:
BEGIN
UPDATE OTHERTAB SET
UCount = COALESCE((SELECT UCount+1 from OTHERTAB T2 WHERE T2.[name] = OTHERTAB.[name]),0)
WHERE [name] in (
SELECT I.[name]
FROM Inserted I
);
END;
Using inserted and set-based approach(no need for loop):
CREATE TRIGGER trg
ON updates
AFTER INSERT
AS
BEGIN
INSERT INTO tab2(name)
SELECT name
FROM inserted;
END
I have a table named WORD with the following columns
WORD_INDEX INT NOT NULL AUTO_INCREMENT,
CONTENT VARCHAR(255),
FREQUENCY INT
What I want to do is when I try to add a row to the table if a row with the same CONTENT exits, I want to increment the FREQUENCY by 1. Otherwise I want to add the row to the table. And then the WORD_INDEX in the newly inserted row or updated row must be returned.
I want to do this in H2 database from one query.
I have tried 'on duplicate key update', but this seems to be not working in H2.
PS- I can do this with 1st making a select query with CONTENT and if I get a empty result set, makeing insert query and otherwise making a update query. But as I have a very large number of words, I am trying to optimize the insert operation. So what I am trying to do is reducing the database interactions I am making.
Per your edited question .. you can achieve this using a stored procedure like below [A sample code]
DELIMITER $$
create procedure sp_insert_update_word(IN CONTENT_DATA VARCHAR(255),
IN FREQ INT, OUT Insert_Id INT)
as
begin
declare #rec_count int;
select #rec_count = count(*) from WORD where content = CONTENT_DATA;
IF(#rec_count > 0) THEN
UPDATE WORD SET FREQUENCY = FREQUENCY + 1 where CONTENT = CONTENT_DATA;
SELECT NULL INTO Insert_Id;
else
INSERT INTO WORD(CONTENT, FREQUENCY) VALUES(CONTENT_DATA, FREQ);
SELECT LAST_INSERT_ID() INTO Insert_Id;
END IF;
END$$
DELIMITER ;
Then call your procedure and select the returned inserted id like below
CALL sp_insert_update_word('some_content_data', 3, #Insert_Id);
SELECT #Insert_Id;
The above procedure code essentially just checking that, if the same content already exists then perform an UPDATE otherwise perform an INSERT. Finally return the newly generated auto increment ID if it's insert else return null.
First try to update frequency where content = "your submitted data here". If the affected row = 0 then insert a new row. You also might want make CONTENT unique considering it will always stored different data.
How to create a procedure that goes from the top of the table and compares the value to null
- If a match is found, insert an element in this position.
- If not, the element is inserted into a new row
I need to correct a second row which contains null values in 4 last columns regardless of values in the Id and PropertyId columns
Here is a screenshot of my DB
Here is a samples of data:
Now it works so, which is not suitable to me, instead it should update the row with null values like on the last screenshot
But the next entry should overwrite the value of NULL for Item, ItemId, InstanceId and Instance
Write a stored procedure like:
create procedure INSERT_OR_UPDATE as
begin
if exists ( select * from Numerations where <your condition> )
begin
update Numerations set < ... > where < ... >
end
else
begin
insert into Numerations values <...>
end
end
You have to check the syntax because I cannot test my code right now.
I need to populate a column with the running count based on another column contents. The table is like this:
count seq_num
1 123-456-789
1 123-456-780
1 123-456-990
2 123-456-789
2 123-456-990
So, as the seq_num column changes, the counter resets to '1' and as the column repeats, the counter increments by 1.
This is using SQL2000, and the seq_num field is varchar.
Any ideas?
If you're inserting, you can use a subquery:
insert into
table (count, seq_num)
values
((select count(*)+1 from table where seq_num = #seq)
,#seq)
Otherwise, you'll need to have a date on there or some way of telling it how to determine what was first:
update table
set count =
(select count(*)+1 from table t2
where t2.seq_num = table.seq_num
and t2.insertdate < table.insertdate)
if you need to be able to continue updating this in the future, you might try this. It's a few steps but would fix it AND set it up for future use. (probably need to check my syntax - I mess with ORacle more now, so I may have mixed up some things - but the logic should work.)
first, create a table to contain the current counter level per sequence:
Create newTable (counter int, sequence varchar)
then, fill it with data like this:
insert into newTable
(select distinct 0 as Counter, sequence
from table)
This will put each sequence number in the table one time and the counter for each will be set at 0.
Then, create an update proc with TWO update statements and a bit of extra logic:
Create procedere counterUpdater(#sequence varchar) as
Declare l_counter as int;
select l_counter = counter
from newTable
where sequence = #sequence
--assuming you have a primary key in the table.
Declare #id int;
Select top 1 #id = id from table
where sequence = #sequence
and counter is null;
--update the table needing edits.
update table
set counter = l_counter + 1
where id = #id
--update the new table so you can keep track of which
--counter you are on
update newTable
set counter = l_counter + 1
where id = #id
Then run a proc to execute this proc for each record in your table.
Now you should have a "newTable" filled with the currently used counter for each record in the table. Set up your insert proc so that anytime a new record is created, if it is a sequence not already in the newTable, you add it with a count of 1 and you put a count of 1 in the main table. If the sequence DOES already exist, use the logic above (increment the count already in use the "newTable" and place that count as the counter value in the newTable and the mainTable.
Basically, this method decided to use memory in place of querying the existing table. It will become most beneficial if you have a large table with lots of repeated sequence numbers. If your sequence numbers only happen two or three times, you probably want to do a query instead when you update and then later insert:
First, to update:
--find out the counter value
Declare l_counter int
select l_counter = max(counter)
from table where sequence = #sequence
update table
set counter = l_counter + 1
where id = (select top 1 id from table where sequence = #sequence
and counter is null)
then run that for each record.
Then, when inserting new records:
Declare l_counter int
select l_counter = max(counter)
from table where sequence = #sequence
IsNull(l_counter, 0)
Insert into table
(counter, sequence) values (l_counter + 1, #sequence)
Again, I'm positive I've mixed-and-matched my syntaxes here, but the concepts should work. OF course, it's a "one at a time" approach instead of set based, so it might be a little inefficient, but it will work.
I'm building a stored procedure. This stored procedure needs to insert a record if a record with a specific value does not exist. If the value does exist, I need to update the record. The problem I'm having is determining if a record with the given value exists or not. I am using the following code:
DECLARE #record1ID as char(36)
SET #record1ID = (SELECT TOP 1 ID FROM Person WHERE [Role]='Manager')
DECLARE #record2ID as char(36)
SET #record2ID = (SELECT TOP 1 d.ID FROM Department d WHERE d.[ManagerID]=#record1ID)
-- If #record2ID is set update record, otherwise add record
-- how do I setup this if/else statement?
Thank you!
If this were a SQL Server as it looks like, you could do a count like this:
declare #rec_counter as int
set #rec_counter = 0
select #rec_counter = count(*) FROM Department d WHERE d.[ManagerID]=#record1
if (#rec_counter > 0)
begin
-- do whatever here
end
IF (EXISTS YOUR_SELECT)
BEGIN ...
or
IF (#record2ID IS NULL)
BEGIN ...
or use select count(*) instead of selecting a value