[
For the cname='Liam', there are 3 card_id
i.e. 87260101, 87260153, 87501026
We want to find out how many extra card_id this person has, means we want output=2.
For the cname='Elizabeth', there are 2 card_id.
i.e.87501022, 87501000 and we want an output of 1.
For the others who only has one card_id which correspond to an empty loss_report_date,
count(loss_report_date)=0, the output=0
For the code below, we get the error code=1111, invalid use of group function, but the store procedure does not report any error when we run procedure alone.
The DBMS we are using is Innodb.
DELIMITER $$
CREATE PROCEDURE Gettransaction(IN cname varchar(50), OUT cnt int)
BEGIN
#select card_id if there is no old_id, if t1.card_id=t2.old_id then use card_id
DECLARE maxcardid char(8);
DECLARE cnt int default 1;
DECLARE nextMax int;
set maxcardid = (select max(card_id) from card
group by cname);
WHILE cname in (select cname from card where count(loss_report_date)>=1)
DO
set nextMax = (select max(card_id)
from card
where card_id < maxcardid);
set cnt = cnt + 1;
set maxcardid = nextMax;
END WHILE;
END$$
DELIMITER ;
call Gettransaction('Liam', #output);
select #output
Related
My data set
Tabel Name Users
unique_id uid
123487.1 1000
123488.1
123489.1
123490.1
As shown above this is my existing data and i want to add uid, so my data should be displayed as shown below.
unique_id uid
123487.1 1000
123488.1 1001
123489.1 1002
123490.1 1003
You don't need cursors for this. Just do an update:
select #u := max(user_id)
from users;
update users
set user_id = (#u := #u + 1)
where user_id is null
order by unique_id;
Providing that uid value is the only a single value in your data set, you can use that simple query:
select unique_id, first_value(uid) over(order by unique_id) + row_number() over(order by unique_id) - 1 fv from users;
https://dbfiddle.uk/?rdbms=mysql_8.0&fiddle=d8102c3ef394d304eefa9d42b5a479ba
Best regards.
You can create a procedure like this:
CREATE PROCEDURE uid_update()
BEGIN
DECLARE Done_c INT;
DECLARE v_min_id INT;
declare number_plus int;
declare v_cur int;
DECLARE curs CURSOR FOR
select ROW_NUMBER() OVER (order by unique_id) rn
from testTable
where uid is null;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET Done_c = 1;
SELECT max(uid) INTO number_plus FROM testTable;
OPEN curs;
SET Done_c = 0;
REPEAT
FETCH curs INTO v_cur;
select min(unique_id) into v_min_id
from testTable
where uid is null;
update testTable
set uid = number_plus + v_cur
where uid is null
and unique_id = v_min_id ;
commit;
UNTIL Done_c END REPEAT;
CLOSE curs;
END
And then call that procedure like this:
call uid_update;
The values will then be updated as you asked for.
Here is the DEMO.
I want to make a stored procedure in MySQL that show a data of a table with a row number and not the id of the row. Like this:
And I tried this code:
CREATE DEFINER=`root`#`localhost` PROCEDURE `count_row`()
BEGIN
declare row_num INTEGER;
declare result INTEGER;
SELECT count(id) FROM engineers INTO row_num;
SET result=0;
WHILE(result<=row_num)
DO
SELECT result=result+1, name, date FROM engineers ;
END WHILE;
END
The result was creating undefined number of tabs in MySQL.
Then I tried this code:
CREATE DEFINER=`root`#`localhost` PROCEDURE `count_row`()
BEGIN
declare row_num INTEGER;
declare result INTEGER;
SELECT count(id) FROM engineers INTO row_num;
SET result=1;
WHILE(result<=row_num)
DO
SELECT result, name, date FROM engineers;
SET result = result +1;
END WHILE;
END
And I got 5 tabs (equal to total row number) like this:
second tab:
What I want is to show only one tab with one table as shown in the first picture of the question.
Try
SELECT #row_number:=#row_number+1 as RowNum, name as Engineer, date
FROM engineers, (SELECT #row_number:=0) as t
order by name;
or
SET #row_number:=0;
SELECT #row_number:=#row_number+1 as RowNum, name as Engineer, date
FROM engineers
order by name;
I cant get this code to return me anything, i used to have the code in 2 functions and it always returned a random first name and a random last name but ever since i tried putting the code into this procedure it doesnt return anything, either empty results or just nothing happens after submitting the CALL command
DROP PROCEDURE IF EXISTS IdGenerator;
DELIMITER $$
CREATE PROCEDURE IdGenerator(tempCntry varchar(255))
BEGIN
DECLARE rndm1 INT;
DECLARE rndm2 INT;
DECLARE rndmPlier INT;
DECLARE firstN varchar(255);
DECLARE lastN varchar(255);
DROP TABLE IF EXISTS pplGrp;
CREATE TEMPORARY TABLE pplGrp(FirstName_tmp varchar(255), LastName_tmp varchar(255));
SELECT MAX(ChancesEnd) INTO rndmPlier FROM personlist WHERE country = tempCntry;
SET rndm1 = FLOOR((1+RAND() * (rndmPlier-1)));
SELECT p.name INTO firstN FROM personlist p WHERE country = tempCntry AND FirstName = 1 AND sex = 0 AND p.ChancesStart <= rndm1 AND p.ChancesEnd >= rndm1 LIMIT 1;
SET rndm2 = FLOOR((1+RAND() * (rndmPlier-1)));
SELECT p.name INTO lastN FROM personlist p WHERE country = tempCntry AND LastName = 1 AND sex = 0 AND p.ChancesStart <= rndm2 AND p.ChancesEnd >= rndm2 LIMIT 1;
INSERT INTO pplGrp (FirstName_tmp, LastName_tmp)values(firstN, lastN);
SELECT * FROM pplGrp;
END$$
DELIMITER ;
I am trying to implement Slop-One recommender using mysql stored procedure, the query runs okay and doesn't give any error. But it is not inserting/updating the 'dev' table.
The structure of tables are:
rating (user_id, article_id, rating_value, date)
dev (article1_id, article2_id, count, sum)
The 'dev' table has joint primary key (article1_id, article2_id). The sql for my procedure is as follows:
DELIMITER $$
CREATE PROCEDURE update_matrix(IN user INT(11), IN article INT(11), IN rating TINYINT(1))
BEGIN
DECLARE article_id2 INT(11);
DECLARE rating_diff TINYINT(1);
DECLARE done TINYINT(1) DEFAULT 0;
DECLARE mycursor CURSOR FOR
SELECT DISTINCT article_id, (rating - rating_value)
FROM rating
WHERE user_id = user AND article_id != article;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
OPEN mycursor;
FETCH mycursor INTO article_id2, rating_diff;
WHILE(!done) DO
INSERT INTO dev (`article1_id`, `article2_id`, `count`, `sum`)
VALUES (article, article_id2, 1, rating_diff)
ON DUPLICATE KEY UPDATE count = count + 1, sum = sum + rating_diff;
INSERT INTO dev (`article1_id`, `article2_id`, `count`, `sum`)
VALUES (article_id2, article, 1, -rating_diff)
ON DUPLICATE KEY UPDATE count = count + 1, sum = sum - rating_diff;
FETCH mycursor INTO article_id2, rating_diff;
END WHILE;
CLOSE mycursor;
END$$
DELIMITER ;
My problem it's this code.
DELIMITER $$
DROP PROCEDURE IF EXISTS agregar_abono$$
CREATE PROCEDURE agregar_abono(IN pid_cliente BIGINT, IN pfecha_abono DATE, IN pmonto_abono FLOAT)
BEGIN
DECLARE #idabono BIGINT;
-- OTHER CODE ...
SELECT id_abono AS idabono FROM abono WHERE fk_cliente = pid_cliente ORDER BY id_abono DESC LIMIT 1;
SELECT CONCAT('>', idabono);
CALL cobrar_abono(pid_cliente, vid_abono);
END $$
The procedure of the two SELECT return:
idabono = 52 --> good! (in the first select)
CONCAT('>', idabono) = null ---> what??
I don't know because don't stored the result in this variable to use in a stored procedure. I use a AS to store the variable.
The header of stored procedure to call is :
CREATE PROCEDURE cobrar_abono(IN pid_cliente BIGINT, IN pid_abono BIGINT)
Are you looking for this?
...
DECLARE idabono BIGINT;
-- OTHER CODE ...
SET idabono = (SELECT id_abono
FROM abono
WHERE fk_cliente = pid_cliente
ORDER BY id_abono DESC
LIMIT 1);
The SELECT statement itself probably can be replaced with
SET idabono = (SELECT MAX(id_abono)
FROM abono
WHERE fk_cliente = pid_cliente);