I have a query like this:
SELECT
a.CREATED,
a.FIRST_REVISION,
a.SECOND_REVISION ,
a.THIRD_REVISION ,
a.FOURTH_REVISION,
a.FIFTH_REVISION
FROM tb_master_repair_estimate a
WHERE a.REPAIR_ESTIMATE_ID = 91
I got result like this :
+---------------------+----------------+-----------------+----------------+-----------------+----------------+
| CREATED | FIRST_REVISION | SECOND_REVISION | THIRD_REVISION | FOURTH_REVISION | FIFTH_REVISION |
+---------------------+----------------+-----------------+----------------+-----------------+----------------+
| 2016-09-26 04:32:22 | 2016-09-25 | 2016-09-25 | 2016-09-25 | NULL | NULL |
+---------------------+----------------+-----------------+----------------+-----------------+----------------+
1 row in set (0.00 sec)
Can I create procedure with logic like this ?
I will check in field FIRST_REVISION,
if null, I used data CREATED to another query
break;
I will check IN field SECOND_REVISION
if null, I use data FIRST_REVISION to another query
break
I will check IN field THIRD_REVISION
if null, I use data SECOND_REVISION to another query
break
I was wondering, it is possible something like procedure to manage it?
Please, give an example, I am newbie to create a function or procedure in mysql.
CREATE FUNCTION F_CHECK_LAST_REVISED
RETURNS DATE
BEGIN
/* LIKE THIS ONE */
END;
I create a procedure like this :
DROP PROCEDURE IF EXISTS P_CHECK_LAST_REVISED;
DELIMITER //
CREATE PROCEDURE P_CHECK_LAST_REVISED(id_cari int(10))
BEGIN
DECLARE pre varchar(50);
DECLARE one varchar(50);
DECLARE two varchar(50);
DECLARE three varchar(50);
DECLARE four varchar(50);
DECLARE five varchar(50);
DECLARE last_revision varchar(50);
SELECT CREATED, FIRST_REVISION, SECOND_REVISION, THIRD_REVISION, FOURTH_REVISION, FIFTH_REVISION
INTO one, two,three, four, five
FROM tb_master_repair_estimate a
WHERE a.REPAIR_ESTIMATE_ID = id_cari;
IF one IS NULL THEN
SELECT b.* FROM tb_repair_detail b
WHERE b.REPAIR_ESTIMATE_ID = id_cari;
ELSEIF two IS NULL THEN
SELECT c.* FROM tb_repair_detail_first_revision c
WHERE c.REPAIR_ESTIMATE_ID = id_cari;
ELSEIF three IS NULL THEN
SELECT d.* FROM tb_repair_detail_second_revision d
WHERE d.REPAIR_ESTIMATE_ID = id_cari;
ELSEIF four IS NULL THEN
SELECT e.* FROM tb_repair_detail_third_revision e
WHERE e.REPAIR_ESTIMATE_ID = id_cari;
ELSEIF five IS NULL THEN
SELECT f.* FROM tb_repair_detail_fourth_revision f
WHERE f.REPAIR_ESTIMATE_ID = id_cari;
ELSE
SELECT g.* FROM tb_repair_detail_fifth_revision g
WHERE gx.REPAIR_ESTIMATE_ID = id_cari;
END IF;
END;
//
So, call P_CHECK_LAST_REVISED(92), I GOT ERROR LIKE THIS :
The used select statment hav a different number columns
hi may be you can try this
`DELIMITER //
Create procedure test(p_REPAIR_ESTIMATE_ID int)
Begin
SELECT
a.CREATED,
a.FIRST_REVISION,
a.SECOND_REVISION ,
a.THIRD_REVISION ,
a.FOURTH_REVISION,
a.FIFTH_REVISION
FROM tb_master_repair_estimate a
WHERE a.REPAIR_ESTIMATE_ID = p_REPAIR_ESTIMATE_ID
End;`
Related
Let me explain my question with an example
Consider the following column of values
City
-------
Chennai
Delhi
Mumbai
Output I want is
City
-------
Chennai
Mumbai
When you look at the values 'Chennai' has two 'N's and 'Mumbai' has two 'M's
What is the query to find the values that satisfy the above said condition
I am using MySQL
You may be able to use some of the logic from here and then filter that way Count all occurances of different characters in a column
Can u try this. If you want you can create function and accepts dynamic value and pass to the corresponding function
IF(LEN('Chennai')-LEN(REPLACE('Chennai', 'N', ''))>1 )
Select 'Chennai'
A possible solution if city names contain only latin characters
SELECT DISTINCT city
FROM table1 c CROSS JOIN
(
SELECT 0 n UNION ALL
SELECT a.N + b.N * 5 + 1 n
FROM
(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4) a
,(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4) b
ORDER BY n
) n
WHERE CHAR_LENGTH(city) - CHAR_LENGTH(REPLACE(LOWER(city), CHAR(97 + n.n), '')) > 1
Output:
| CITY |
|---------|
| Mumbai |
| Chennai |
Here is SQLFiddle demo
You can use stored procedure for this. Please check my code -
Create table statement -
CREATE TABLE `Cities` (
`City` varchar(100) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Added cities to table and created procedure -
CREATE PROCEDURE `SP_SplitString`()
BEGIN
DECLARE front TEXT DEFAULT NULL;
DECLARE count INT DEFAULT 0;
DECLARE arrayText longtext default "";
DECLARE Value longtext DEFAULT "";
DECLARE val longtext DEFAULT "";
DECLARE done INT DEFAULT FALSE;
DECLARE cityCursor CURSOR FOR SELECT * FROM `Cities`;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
OPEN cityCursor;
loop_through_rows:
LOOP
FETCH cityCursor INTO Value;
IF done THEN
LEAVE loop_through_rows;
END IF;
SET val = Value;
iterator:
LOOP
IF LENGTH(TRIM(val)) = 0 OR val IS NULL THEN
LEAVE iterator;
END IF;
SET front = LOWER(SUBSTRING(val,1,1));
SET count = LENGTH(Value) - LENGTH(REPLACE(LOWER(Value), front, ''));
IF count > 1 THEN
IF LENGTH(TRIM(arrayText)) = 0 THEN
SET arrayText = Value;
ELSE
SET arrayText = CONCAT(arrayText,",",Value);
END IF;
LEAVE iterator;
END IF;
IF LENGTH(TRIM(val)) > 1 THEN
SET val = SUBSTRING(val,2,LENGTH(TRIM(val)));
ELSE
SET val = "";
END IF;
END LOOP;
END LOOP;
SELECT * FROM `Cities` WHERE FIND_IN_SET(City, arrayText);
END
I have the following table:
id | parent_id | quantity
-------------------------
1 | null | 5
2 | null | 3
3 | 2 | 10
4 | 2 | 15
5 | 3 | 2
6 | 5 | 4
7 | 1 | 9
Now I need a stored procedure in mysql that calls itself recursively and returns the computed quantity.
For example the id 6 has 5 as a parent which as 3 as a parent which has 2 as a parent.
So I need to compute 4 * 2 * 10 * 3 ( = 240) as a result.
I am fairly new to stored procedures and I won't use them very often in the future because I prefer having my business logic in my program code rather then in the database. But in this case I can't avoid it.
Maybe a mysql guru (that's you) can hack together a working statement in a couple of seconds.
its work only in mysql version >= 5
the stored procedure declaration is this,
you can give it little improve , but this working :
DELIMITER $$
CREATE PROCEDURE calctotal(
IN number INT,
OUT total INT
)
BEGIN
DECLARE parent_ID INT DEFAULT NULL ;
DECLARE tmptotal INT DEFAULT 0;
DECLARE tmptotal2 INT DEFAULT 0;
SELECT parentid FROM test WHERE id = number INTO parent_ID;
SELECT quantity FROM test WHERE id = number INTO tmptotal;
IF parent_ID IS NULL
THEN
SET total = tmptotal;
ELSE
CALL calctotal(parent_ID, tmptotal2);
SET total = tmptotal2 * tmptotal;
END IF;
END$$
DELIMITER ;
the calling is like
(its important to set this variable) :
SET ##GLOBAL.max_sp_recursion_depth = 255;
SET ##session.max_sp_recursion_depth = 255;
CALL calctotal(6, #total);
SELECT #total;
Take a look at Managing Hierarchical Data in MySQL by Mike Hillyer.
It contains fully worked examples on dealing with hierarchical data.
How about avoiding procedures:
SELECT quantity from (
SELECT #rq:=parent_id as id, #val:=#val*quantity as quantity from (
select * from testTable order by -id limit 1000000 # 'limit' is required for MariaDB if we want to sort rows in subquery
) t # we have to inverse ids first in order to get this working...
join
( select #rq:= 6 /* example query */, #val:= 1 /* we are going to multiply values */) tmp
where id=#rq
) c where id is null;
Check out Fiddle!
Note! this will not work if row's parent_id>id.
Cheers!
DELIMITER $$
CREATE DEFINER=`arun`#`%` PROCEDURE `recursivesubtree`( in iroot int(100) , in ilevel int(110) , in locid int(101) )
BEGIN
DECLARE irows,ichildid,iparentid,ichildcount,done INT DEFAULT 0;
DECLARE cname VARCHAR(64);
SET irows = ( SELECT COUNT(*) FROM account WHERE parent_id=iroot and location_id=locid );
IF ilevel = 0 THEN
DROP TEMPORARY TABLE IF EXISTS _descendants;
CREATE TEMPORARY TABLE _descendants (
childID INT, parentID INT, name VARCHAR(64), childcount INT, level INT
);
END IF;
IF irows > 0 THEN
BEGIN
DECLARE cur CURSOR FOR
SELECT
f.account_id,f.parent_id,f.account_name,
(SELECT COUNT(*) FROM account WHERE parent_id=t.account_id and location_id=locid ) AS childcount
FROM account t JOIN account f ON t.account_id=f.account_id
WHERE t.parent_id=iroot and t.location_id=locid
ORDER BY childcount<>0,t.account_id;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;
OPEN cur;
WHILE NOT done DO
FETCH cur INTO ichildid,iparentid,cname,ichildcount;
IF NOT done THEN
INSERT INTO _descendants VALUES(ichildid,iparentid,cname,ichildcount,ilevel );
IF ichildcount > 0 THEN
CALL recursivesubtree( ichildid, ilevel + 1 );
END IF;
END IF;
END WHILE;
CLOSE cur;
END;
END IF;
IF ilevel = 0 THEN
-- Show result table headed by name that corresponds to iroot:
SET cname = (SELECT account_name FROM account WHERE account_id=iroot and location_id=locid );
SET #sql = CONCAT('SELECT CONCAT(REPEAT(CHAR(36),2*level),IF(childcount,UPPER(name),name))',
' AS ', CHAR(39),cname,CHAR(39),' FROM _descendants');
PREPARE stmt FROM #sql;
EXECUTE stmt;
DROP PREPARE stmt;
END IF;
END$$
DELIMITER ;
I tried some, but I couldn't find the solution, somehow I managed to get this result.
Here is the query:
DELIMITER ##
CREATE PROCEDURE test1(start_date DATE,end_date DATE)
BEGIN
DECLARE done INT DEFAULT FALSE;
DECLARE a INT;
DECLARE present INT;
DECLARE total INT;
-- Declare the cursor
DECLARE id CURSOR
FOR
SELECT staff_id FROM ost_staff;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
-- Open the cursor
DROP TEMPORARY TABLE IF EXISTS reports;
CREATE TEMPORARY TABLE IF NOT EXISTS reports
(
staff_id INT(10),
present INT(10),
total INT(10)
);
OPEN id;
read_loop: LOOP
FETCH id INTO a;
IF done THEN
LEAVE read_loop;
END IF;
INSERT INTO reports(staff_id,present,total)
SELECT (COUNT(I.interval_start)) AS present, DATEDIFF(DATE_ADD(end_date,INTERVAL 1 DAY),start_date) AS total
FROM effort_frequency E
RIGHT OUTER JOIN time_intervals I ON I.interval_start = E.log_date
AND E.staffid=a AND E.log_date BETWEEN start_date AND end_date
LEFT OUTER JOIN ost_holidays H ON H.holiday_date = I.interval_start
WHERE DATE_FORMAT(I.interval_start,'%a') = 'Sun' OR H.holiday_date = I.interval_start OR E.total_effortspent IS NOT NULL;
-- Close the cursor
END LOOP;
CLOSE id;
END ##
I got the below result:
+----------+-----------------+
| staff_id | present | total |
+----------+---------+-------+
| (NULL) | 23 | 24 |
| (NULL) | 22 | 24 |
+----------+---------+-------+
I'm getting (NULL) for staff_id, How can I get the staff_id's there ?
I tried using declared variable 'a' in insert statement, but at that time I got only staff_id, I didn't get the other 2 fields, I can't get the staff_id from the select inside insert statement coz there is some problem.
Now what i need is I need to insert the staff_id from the variable 'a' into that temporary table.
note: I'm really new to this stored procedure, but somehow managed till here, Its good if I get some detail on how to use the Select inside Insert including the solution for this.
Try this -
SELECT a, (COUNT(I.interval_start)) AS present, DATEDIFF(DATE_ADD(end_date,INTERVAL 1 DAY),start_date) AS total
Your INSERT requires three fields, but your SELECT statement only selects two: present and total .
Try:
SELECT E.staffid, (COUNT(I.interval_start))
AS present, DATEDIFF(DATE_ADD(end_date,INTERVAL 1 DAY),start_date) AS total
For instance, if I have data in a column like this
data
I love book
I love apple
I love book
I hate apple
I hate apple
How can I get result like this
I = 5
love = 3
hate = 2
book = 2
apple = 3
Can we achieve this with MySQL?
Here is a solution only using a query:
SELECT SUM(total_count) as total, value
FROM (
SELECT count(*) AS total_count, REPLACE(REPLACE(REPLACE(x.value,'?',''),'.',''),'!','') as value
FROM (
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(t.sentence, ' ', n.n), ' ', -1) value
FROM table_name t CROSS JOIN
(
SELECT a.N + b.N * 10 + 1 n
FROM
(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) a
,(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) b
ORDER BY n
) n
WHERE n.n <= 1 + (LENGTH(t.sentence) - LENGTH(REPLACE(t.sentence, ' ', '')))
ORDER BY value
) AS x
GROUP BY x.value
) AS y
GROUP BY value
Here is the full working fiddle: http://sqlfiddle.com/#!2/17481a/1
First we do a query to extract all words as explained here by #peterm(follow his instructions if you want to customize the total number of words processed). Then we convert that into a sub-query and then we COUNT and GROUP BY the value of each word, and then make another query on top of that to GROUP BY not grouped words cases where accompanied signs might be present. ie: hello = hello! with a REPLACE
If you want to perform such kind of text analysis, I would recommend using something like lucene, to get the termcount for each term in the document.
This query is going to take a long time to run if your table is of any decent size. It may be better to keep track of the counts in a separate table and update that table as values are inserted or, if real time results are not necessary, to only run this query every so often to update the counts table and pull your data from it. That way, you're not spending minutes to get data from this complex query.
Here's what I've for you so far. It's a good start. The only thing you need to do is modify it to iterate through the words in each row. You could use a cursor or a subquery.
Create test table:
create table tbl(str varchar(100) );
insert into tbl values('data');
insert into tbl values('I love book');
insert into tbl values('I love apple');
insert into tbl values('I love book');
insert into tbl values('I hate apple');
insert into tbl values('I hate apple');
Pull data from test table:
SELECT DISTINCT str AS Word, COUNT(str) AS Frequency FROM tbl GROUP BY str;
create a user defined function like this and use it in your query
DELIMITER $$
CREATE FUNCTION `getCount`(myStr VARCHAR(1000), myword VARCHAR(100))
RETURNS INT
BEGIN
DECLARE cnt INT DEFAULT 0;
DECLARE result INT DEFAULT 1;
WHILE (result > 0) DO
SET result = INSTR(myStr, myword);
IF(result > 0) THEN
SET cnt = cnt + 1;
SET myStr = SUBSTRING(myStr, result + LENGTH(myword));
END IF;
END WHILE;
RETURN cnt;
END$$
DELIMITER ;
Hope it helps
Refer This
Split-string procedure is not my job. You can find it here
http://forge.mysql.com/tools/tool.php?id=4
I wrote you the rest of code.
drop table if exists mytable;
create table mytable (
id int not null auto_increment primary key,
mytext varchar(1000)
) engine = myisam;
insert into mytable (mytext)
values ('I love book,but book sucks!What do you,think about it? me too'),('I love apple! it rulez.,No, it sucks a lot!!!'),('I love book'),('I hate apple!!! Me too.,!'),('I hate apple');
drop table if exists mywords;
create table mywords (
id int not null auto_increment primary key,
word varchar(50)
) engine = myisam;
delimiter //
drop procedure if exists split_string //
create procedure split_string (
in input text
, in `delimiter` varchar(10)
)
sql security invoker
begin
declare cur_position int default 1 ;
declare remainder text;
declare cur_string varchar(1000);
declare delimiter_length tinyint unsigned;
drop temporary table if exists SplitValues;
create temporary table SplitValues (
value varchar(1000) not null
) engine=myisam;
set remainder = input;
set delimiter_length = char_length(delimiter);
while char_length(remainder) > 0 and cur_position > 0 do
set cur_position = instr(remainder, `delimiter`);
if cur_position = 0 then
set cur_string = remainder;
else
set cur_string = left(remainder, cur_position - 1);
end if;
if trim(cur_string) != '' then
insert into SplitValues values (cur_string);
end if;
set remainder = substring(remainder, cur_position + delimiter_length);
end while;
end //
delimiter ;
delimiter //
drop procedure if exists single_words//
create procedure single_words()
begin
declare finish int default 0;
declare str varchar(200);
declare cur_table cursor for select replace(replace(replace(replace(mytext,'!',' '),',',' '),'.',' '),'?',' ') from mytable;
declare continue handler for not found set finish = 1;
truncate table mywords;
open cur_table;
my_loop:loop
fetch cur_table into str;
if finish = 1 then
leave my_loop;
end if;
call split_string(str,' ');
insert into mywords (word) select * from splitvalues;
end loop;
close cur_table;
end;//
delimiter ;
call single_words();
select word,count(*) as word_count
from mywords
group by word;
+-------+------------+
| word | word_count |
+-------+------------+
| a | 1 |
| about | 1 |
| apple | 3 |
| book | 3 |
| but | 1 |
| do | 1 |
| hate | 2 |
| I | 5 |
| it | 3 |
| lot | 1 |
| love | 3 |
| me | 2 |
| No | 1 |
| rulez | 1 |
| sucks | 2 |
| think | 1 |
| too | 2 |
| What | 1 |
| you | 1 |
+-------+------------+
19 rows in set (0.00 sec)
The code must be improved in order to consider any punctuation but this is the general idea.
I have the following table:
id | parent_id | quantity
-------------------------
1 | null | 5
2 | null | 3
3 | 2 | 10
4 | 2 | 15
5 | 3 | 2
6 | 5 | 4
7 | 1 | 9
Now I need a stored procedure in mysql that calls itself recursively and returns the computed quantity.
For example the id 6 has 5 as a parent which as 3 as a parent which has 2 as a parent.
So I need to compute 4 * 2 * 10 * 3 ( = 240) as a result.
I am fairly new to stored procedures and I won't use them very often in the future because I prefer having my business logic in my program code rather then in the database. But in this case I can't avoid it.
Maybe a mysql guru (that's you) can hack together a working statement in a couple of seconds.
its work only in mysql version >= 5
the stored procedure declaration is this,
you can give it little improve , but this working :
DELIMITER $$
CREATE PROCEDURE calctotal(
IN number INT,
OUT total INT
)
BEGIN
DECLARE parent_ID INT DEFAULT NULL ;
DECLARE tmptotal INT DEFAULT 0;
DECLARE tmptotal2 INT DEFAULT 0;
SELECT parentid FROM test WHERE id = number INTO parent_ID;
SELECT quantity FROM test WHERE id = number INTO tmptotal;
IF parent_ID IS NULL
THEN
SET total = tmptotal;
ELSE
CALL calctotal(parent_ID, tmptotal2);
SET total = tmptotal2 * tmptotal;
END IF;
END$$
DELIMITER ;
the calling is like
(its important to set this variable) :
SET ##GLOBAL.max_sp_recursion_depth = 255;
SET ##session.max_sp_recursion_depth = 255;
CALL calctotal(6, #total);
SELECT #total;
Take a look at Managing Hierarchical Data in MySQL by Mike Hillyer.
It contains fully worked examples on dealing with hierarchical data.
How about avoiding procedures:
SELECT quantity from (
SELECT #rq:=parent_id as id, #val:=#val*quantity as quantity from (
select * from testTable order by -id limit 1000000 # 'limit' is required for MariaDB if we want to sort rows in subquery
) t # we have to inverse ids first in order to get this working...
join
( select #rq:= 6 /* example query */, #val:= 1 /* we are going to multiply values */) tmp
where id=#rq
) c where id is null;
Check out Fiddle!
Note! this will not work if row's parent_id>id.
Cheers!
DELIMITER $$
CREATE DEFINER=`arun`#`%` PROCEDURE `recursivesubtree`( in iroot int(100) , in ilevel int(110) , in locid int(101) )
BEGIN
DECLARE irows,ichildid,iparentid,ichildcount,done INT DEFAULT 0;
DECLARE cname VARCHAR(64);
SET irows = ( SELECT COUNT(*) FROM account WHERE parent_id=iroot and location_id=locid );
IF ilevel = 0 THEN
DROP TEMPORARY TABLE IF EXISTS _descendants;
CREATE TEMPORARY TABLE _descendants (
childID INT, parentID INT, name VARCHAR(64), childcount INT, level INT
);
END IF;
IF irows > 0 THEN
BEGIN
DECLARE cur CURSOR FOR
SELECT
f.account_id,f.parent_id,f.account_name,
(SELECT COUNT(*) FROM account WHERE parent_id=t.account_id and location_id=locid ) AS childcount
FROM account t JOIN account f ON t.account_id=f.account_id
WHERE t.parent_id=iroot and t.location_id=locid
ORDER BY childcount<>0,t.account_id;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;
OPEN cur;
WHILE NOT done DO
FETCH cur INTO ichildid,iparentid,cname,ichildcount;
IF NOT done THEN
INSERT INTO _descendants VALUES(ichildid,iparentid,cname,ichildcount,ilevel );
IF ichildcount > 0 THEN
CALL recursivesubtree( ichildid, ilevel + 1 );
END IF;
END IF;
END WHILE;
CLOSE cur;
END;
END IF;
IF ilevel = 0 THEN
-- Show result table headed by name that corresponds to iroot:
SET cname = (SELECT account_name FROM account WHERE account_id=iroot and location_id=locid );
SET #sql = CONCAT('SELECT CONCAT(REPEAT(CHAR(36),2*level),IF(childcount,UPPER(name),name))',
' AS ', CHAR(39),cname,CHAR(39),' FROM _descendants');
PREPARE stmt FROM #sql;
EXECUTE stmt;
DROP PREPARE stmt;
END IF;
END$$
DELIMITER ;