I am trying to write a procedure that update the the content in one column, based a change in date is more than 20 days. In context, the procedure decreases the price of a good if the time passed since acquired is more than 20 days.
I am using the DATEDIFF function as well as GETDATE() statement but I am really strugling. At this point I am stucked.
Can anybody tell what is wrong with my sql code?
DELIMITER //
CREATE PROCEDURE UPDATE_PRICE
DECLARE #TIMEPASSED AS TIME
SET #TIMEPASSED = GETDATE()
BEGIN
UPDATE sales SET sales.SalesPrice = sales.SalesPrice - 30
WHERE DATEDIFF(#GETDATE(), Sales.AcquisitionDate;
END;;
Any help on this one would be much appreciated
Variable declarations should be in the BEGIN/END block, but they are not really needed in this case. GETDATE() is not a MySQL function. So:
DELIMITER //
CREATE PROCEDURE UPDATE_PRICE
BEGIN
UPDATE sales s
SET s.SalesPrice = s.SalesPrice - 30
WHERE s.AcquisitionDate < CURDATE() - INTERVAL 20 day;
END;
DELIMITER ;
Try this:
DELIMITER //
CREATE PROCEDURE UPDATE_PRICE
DECLARE #TIMEPASSED AS TIME
SET #TIMEPASSED = GETDATE()
BEGIN
UPDATE sales SET sales.SalesPrice = sales.SalesPrice - 30
WHERE DATEDIFF(#GETDATE(), Sales.AcquisitionDate) > 20;
END;
Related
I have a query :
insert into fookoo_business
select stat_date, sum(spend), sum(revenue)
from hooloo_business;
that i want to run for each date from '2017-01-20' until yesterday (it means the query will run 434 times if we're at 01/04/2018), for each date separately
(in a loop).
how can i create a loop in Mysql to do it for me?
I have tried:
creating procedure for the query select #stat_date, sum(spend), sum(revenue)
I called 'query'
then :
CREATE PROCEDURE loop_procedure()
BEGIN
SET #stat_date='2018-03-20';
CALL 'query';
REPEAT
SET #stat_date = #stat_date + INTERVAL 1 DAY;
UNTIL #stat_date = CURDATE() END REPEAT;
END
eventually i've used the following logic within a stored procedure to fetch the data:
PROCEDURE `x_monitoring_loop`()
BEGIN
DECLARE i INT;
DECLARE len INT;
SET len = 434;
SET i = 0;
WHILE (i < len) DO
SET #stat_date= CURDATE()-INTERVAL 1 DAY;
SET #stat_date= #stat_date- INTERVAL i DAY;
Insert query;
SET i = i +1;
END WHILE;
This way the query ran 434 times for each day, beginning at current date - 1 day.
I do not know why you want to use a procedure,I think we can just use a query sql to do it:
INSERT INTO fookoo_business
SELECT stat_date, SUM(spend), SUM(revenue)
FROM hooloo_business
WHERE stat_date BETWEEN STR_TO_DATE('2017-01-02', '%Y-%m-%d') -- start date
AND DATE_SUB(NOW(), INTERVAL 1 DAY) -- end date
GROUP BY stat_date;
Convert this time format into seconds:
SELECT ROUND(TIME_TO_SEC('8: 2:9')/60);
I want the output is 482 minutes in MySQL. some times in a data base time stored with space for example '08:02:23' is saved as '08: 2:23' so want to retrieve that time to a minutes
Right way to use it as:
SELECT ROUND(TIME_TO_SEC('08:02:09')/60);
Output : 482 minutes
TIME_TO_SEC('08:02:09') will be 28929 sec & if its divided by 60, then the result will be in minutes. As you said it will be 482 minutes.
The issue in the below query is that the space before minute.
SELECT ROUND(TIME_TO_SEC('8: 2:9')/60);
You can use it as(without space):
SELECT ROUND(TIME_TO_SEC('8:2:9')/60);
Try this one, sometime may help:
SELECT ROUND(TIME_TO_SEC(REPLACE('8: 2:9',' ',''))/60);
DELIMITER $$
DROP FUNCTION IF EXISTS `tim_to_min`$$
CREATE FUNCTION tim_to_min(f_time VARCHAR(30))
RETURNS VARCHAR(255)
DETERMINISTIC
BEGIN
DECLARE h VARCHAR(30);
DECLARE m VARCHAR(30);
DECLARE s VARCHAR(30);
SET h=SUBSTRING_INDEX(f_time,':',1);
SET m = REPLACE(SUBSTRING(SUBSTRING_INDEX(f_time,':',2),
LENGTH(SUBSTRING_INDEX(f_time,':',1))+1),':','');
SET s = REPLACE(SUBSTRING(SUBSTRING_INDEX(f_time,':',3),
LENGTH(SUBSTRING_INDEX(f_time,':',2))+1),':','');
RETURN ROUND((h*60)+m+(s/60),0);
END$$
DELIMITER ;
--> use this stored function in mysql
then call the function..
SELECT tim_To_min('8: 2:9'); /*call function tim_to_min */
I want to assign value of a query to a datetime variable in MySql Stored Procedure.
I'm trying this -
DECLARE myDate DATETIME;
SET myDate = (SELECT date1 FROM myTable WHERE Id = var_myId);
And this
DECLARE myDate DATETIME;
SELECT date1 into myDate FROM myTable WHERE Id = var_myId;
Both don't seem to work as I am not getting the desired result after running the proc.
EDIT
Problem is in this statement -
initial_Date DATETIME; -- param1
interval INTEGER; -- param2
SET var_date2 = DATE_ADD(initial_Date , INTERVAL interval MINUTE);
When I select var_date2 I get null as result.
I find two issue with your stored procedure.
First, you are naming a variable using an sql key word interval. You should rename with an word which is not an sql key word.
The other is you are not setting an out put variable. You can see the MySQL tutorials on stored procedure.
You can use and try the code below:
delimiter //
create procedure test(in initial_time datetime, in minuteInterval integer(2),
out final_time datetime)
begin
set final_time = date_add(initial_time, interval minuteInterval minute);
end//
delimiter ;
For testing you can try:
call test(now(), 60, #final_time);
select #final_time;
Here is the screenshot of my test with mysql 5.5.21:
I have a stored procedure, shown below, which I created to add dollar sales to a table (WeeklySales) which currently stores only unit sales. The cursor operates on on the WeeklySales table. The pricing data is stored in the Pricing table. The Pricing table actually contains changes in prices. The effective date for a price change is stored in Pricing.effectiveDate, so I have to find the pricing which was effective for the week in which the unit was sold (which is stored in WeeklySales.weekStart).
The problem I'm having is that the first select after the IF doesn't return anything. I've confirmed that this select does return a value when I run it outside of the procedure using the values which it would be called with inside the procedure. I'm not sure what's wrong here, but I'm guessing maybe this has to do with the fact that the this select is operating on a table which is different from the cursor? Anyone know? Is there a better way to do this?
DELIMITER //
CREATE PROCEDURE `createWeeklyPricing` (IN startDate DATE, IN endDate DATE)
BEGIN
--
-- Populate the proceeds column using the Pricing table
DECLARE product VARCHAR(255);
DECLARE weekStart DATE;
DECLARE units, done INT;
DECLARE proceeds DECIMAL(6,2);
DECLARE effectiveDate DATE;
DECLARE currentRow CURSOR FOR SELECT `weekStart`, `product`, `units` FROM `WeeklySales` WHERE `weekStart` >= startDate AND `weekStart` <= endDate;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
OPEN currentRow;
SET done = 0;
WHILE done = 0 DO
FETCH currentRow INTO weekStart, product, units;
IF done = 0 THEN
SELECT MAX(`effectiveDate`) FROM `Pricing` WHERE `effectiveDate` <= weekStart AND `product` = product INTO effectiveDate;
SELECT `proceeds` FROM `Pricing` WHERE `effectiveDate` = effectiveDate AND `product` = product INTO proceeds;
UPDATE `WeeklySales` SET `proceeds` = units * proceeds WHERE `weekStart` = weekStart AND `product` = product;
END IF;
END WHILE;
CLOSE currentRow;
END//
echo (select) weekstart before the if statement...
If it returns null change the select FROM WeeklySales WHERE weekStart between startDate AND endDate
you need to use the INTO before FROM and variable needs '#' sign
change it to
SELECT MAX(`effectiveDate`) INTO #effectiveDate FROM `Pricing` WHERE `effectiveDate` <= weekStart AND `product` = product ;
hope this helps
This is because your variable name is overwriting your column name:
You have a variable named 'effectiveDate'
You have a column named 'effectiveDate'
SELECT MAX(`effectiveDate`) ...
Is MAX-ing the variable effectiveDate, not the column
Try naming the variable maxEffectiveDate
Beware that variables are case insensitive. This happened to me when i tried to select column IsBackUp into variable isBackUp (notice the i).
Im trying to make a procedure, which will be checking if user is already logged (he got a session, and im checking if his last action was over 15 minutes ago). My procedure looks like this:
CREATE PROCEDURE `isLogged`(in p_sessid VARCHAR(32), out res INT(1))
BEGIN
DECLARE v_customer_id INT(9);
DECLARE v_date DATE;
SELECT customer_id INTO v_customer_id FROM Sessions WHERE sessid=p_sessid;
SELECT expiry_date INTO v_date FROM Sessions WHERE sessid=p_sessid;
SET res=3;
IF v_customer_id > 0 THEN
IF UNIX_TIMESTAMP(NOW()) > UNIX_TIMESTAMP(v_date) THEN
DELETE FROM Sessions WHERE sessid=p_sessid;
SET res=1;
ELSE
UPDATE Sessions SET expiry_date=DATE_ADD(NOW(), INTERVAL 15 MINUTE) WHERE customer_id=v_customer_id;
SET res=0;
END IF;
END IF;
END
Can anyone tell, why it always return 1, what means that user is not logged anymore? I were checking manually expression UNIX_TIMESTAMP(NOW()) > UNIX_TIMESTAMP(v_date), and it gives me 0 in response, so? Whats going on?
Thanks in advance,
Marcin
The first IF statement should read like this:
UNIX_TIMESTAMP(NOW()) > UNIX_TIMESTAMP(DATE_ADD(v_date, INTERVAL 15 MINUTE))
or else NOW will always be greater than the last login date.
You may rewrite/optimize your procedure to function. For example -
CREATE FUNCTION `isLogged`(IN p_sessid VARCHAR(32))
RETURNS INT
BEGIN
DELETE FROM Sessions WHERE sessid = p_sessid AND v_date <= NOW() - INTERVAL 15 MINUTE;
IF ROW_COUNT() > 0 THEN -- check how many rows were deleted
RETURN 1;
ELSE
UPDATE Sessions SET expiry_date = NOW() + INTERVAL 15 MINUTE WHERE customer_id = v_customer_id;
IF ROW_COUNT() > 0 THEN -- check how many rows were updated
RETURN 0;
END IF;
END IF;
RETURN 3;
END
Also, you can try to debug your code to understand the error.
Omg, that was very stupid.
There was a type mismatch. v_date type was a DATE, and this is just a day! Like 2011-12-14.
Solution:
change DATE -> DATETIME.
And now everything works good.
Anyway, thank you for answers.