This question already has answers here:
MYSQL REGEXP search in JSON string
(3 answers)
Closed 7 years ago.
I have three records in mysql:
1. a:7:{s:10:"state_name";s:11:"West Bengal";s:7:"city_id";a:40:{i:0;s:4:"1166";i:1;s:4:"1454";i:2;s:4:"1455";i:3;s:4:"1456";i:4;s:4:"1458";i:5;s:4:"1459";i:6;s:4:"1460";i:7;s:4:"1461";i:8;s:4:"1463";i:9;s:4:"1464";i:10;s:4:"1465";i:11;s:4:"1466";i:12;s:4:"1468";i:13;s:4:"1469";i:14;s:4:"1470";i:15;s:4:"1471";i:16;s:4:"1473";i:17;s:4:"1474";i:18;s:4:"1475";i:19;s:4:"1476";i:20;s:4:"1478";i:21;s:4:"1479";i:22;s:4:"1480";i:23;s:4:"1481";i:24;s:4:"1483";i:25;s:4:"1484";i:26;s:4:"1485";i:27;s:4:"1486";i:28;s:4:"1488";i:29;s:4:"1489";i:30;s:4:"1490";i:31;s:4:"1491";i:32;s:4:"1493";i:33;s:4:"1494";i:34;s:4:"1495";i:35;s:4:"1496";i:36;s:4:"1498";i:37;s:4:"1499";i:38;s:4:"1500";i:39;s:4:"1501";}s:6:"gender";s:4:"male";s:3:"age";s:0:"";s:12:"category_ids";s:2:"68";s:16:"product_type_ids";s:2:"30";s:18:"min_purchase_price";s:1:"0";}
2. a:7:{s:10:"state_name";s:11:"West Bengal";s:7:"city_id";a:8:{i:0;s:4:"1465";i:1;s:4:"1466";i:2;s:4:"1467";i:3;s:4:"1471";i:4;s:4:"1475";i:5;s:4:"1476";i:6;s:4:"1478";i:7;s:4:"1479";}s:6:"gender";s:0:"";s:3:"age";s:4:"0-30";s:12:"category_ids";s:2:"58";s:16:"product_type_ids";s:0:"";s:18:"min_purchase_price";s:2:"50";}
3. a:7:{s:10:"state_name";s:11:"West Bengal";s:7:"city_id";a:1:{i:0;s:4:"1475";}s:6:"gender";s:6:"female";s:3:"age";s:4:"0-30";s:12:"category_ids";s:2:"58";s:16:"product_type_ids";s:0:"";s:18:"min_purchase_price";s:3:"100";}
with the column name conditions_serialized.
Now I am trying to write a sql query to fetch all the records having city_id 1475.
My code is like :
SELECT `main_table`.*, `rule_coupons`.`code` FROM `salesrule` AS `main_table` LEFT JOIN `salesrule_coupon` AS `rule_coupons` ON main_table.rule_id = rule_coupons.rule_id AND rule_coupons.is_primary = 1 WHERE (conditions_serialized regexp 'city_id";a:[0-9]*:{.*(i:[0-9]*;s:[0-9]*:"1475";)}')
But by this only 2 records are displaying 2nd and 3rd, not the first one.
Could you please check my query and rectify that why it is not displaying all?
Thanks in advance.
You are looking explicitly for 1475
city_id";a:[0-9]*:{.*(i:[0-9]*;s:[0-9]*:"**1475**";)}
change it to this instead to get records from the 3 records. Note: from 3 to 5 digits
city_id";a:[0-9]*:{.*(i:[0-9]*;s:[0-9]*:"\d{3,5}";)}
Related
This question already has answers here:
Is floating point math broken?
(31 answers)
Closed 2 years ago.
I have two colums on mysql database table which holds float values. What I need is to get the sum of two colums and my mysql query is as follow
SELECT amntGot,commission, SUM(amntGot+commission) as amt from mytable;
Issue I got is the sum value goes wrong in the result
For example
amntGot = 4.6175 commission = 0.3825 Then amt goes to 4.999999821186066 . I expect result as 5 Which is (4.6175+0.3825)
I dont know why the result gives me 4.999999821186066 instead of 5
I could not find a dolution from StackOverflow, so any solution would be much appreciated,
I have attached screenshots of few results below
You can try this:
SELECT amntGot,commission, ROUND(SUM(amntGot+commission),0) as amt from mytable;
This question already has answers here:
Select row with most recent date per user
(14 answers)
Closed 4 years ago.
I'm trying to come up with a single mySQL query that will take the data below and output the sample output I provided.
Basically what I'm looking for is an output that show only the most recent entry for each person in the table, (their name and the total_points).
The catch here is I only want to show people who have at least 200 points in their most recent entry. In my example output only jeff and bob would have at least 200 points , but ted would NOT and should not be part on the output.
Is there a way to do this in a single query or would I have to break it out into separate queries?
Table Structure:
person------------date--------------------------------------total_points
jeff-----------------2018-07-16 09:00:00----------------300
bob----------------2018-07-15 09:00:00----------------500
ted-----------------2018-07-09 09:00:00----------------100
jeff-----------------2018-07-09 09:00:00----------------700
bob----------------2018-07-03 09:00:00----------------180
ted-----------------2018-06-10 09:00:00----------------1200
Output:
person--------total_points
jeff-------------300
bob------------500
One method uses a correlated subquery to get the most recent value:
select t.*
from t
where t.date = (select max(t2.date) from t t2 where t2.person = t.person) and
t.total_points >= 200;
This question already has answers here:
Find total number of results in mySQL query with offset+limit
(7 answers)
Closed 6 years ago.
I am making a pagination function, here is my case:
1 table (example)
id | title | date | details
Now, I want to retrieve two different results from this table (example)
Count all of the rows (for the total count of all the lists)
I will only show every 10 list per page.
My current code is, I have 2 separated queries for 1 and 2, so it is like 2 connections, my question is, can this be done with a single query and then retrieve both of 1 and 2 results? If so, what do I need to do? Any suggestion/s can help me!
I think,
This will help you.
Step 1: Get the all list from the table
Step 2: Then count the records
Here is the single query to perform it.
SELECT COUNT(tmp.id) as cnt, tmp.* FROM (SELECT id, title, date, details FROM tablename) tmp
This question already has answers here:
How to use count and group by at the same select statement
(11 answers)
Closed 6 years ago.
SELECT exam_board, COUNT(*)
FROM subjects
GROUP BY exam_board;
This is a block of code where 'exam_board' is a field in a table called 'subjects'.
What does each line of code in this block do?
Gives you how much records have the same exam_board value for each different exam_board value.
For example, if your table has this data:
|exam_board|
A
A
A
B
B
this query will return:
|exam_board |COUNT(*)
A 3
B 2
Gives you the count of total number of records fetched in query.
In your specific case, it will give you count of each exam_board group.
exam_board count
A 10
B 29
Something like this.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
SQL: Select columns with NULL values only
Find fields that aren't used (have all nulls)
I have a table with 400 feilds and 3 Bil rows out of which 100 of them have no values/data. Can some one please give me a sample example or suggestion on how to proceed to get the list of those 100 columns which has null for all the 3 Bil rows in that table.
Thank you in advance.