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How can I simulate that my MySQL field is an array, and later with some query to search element in that array ?
In only MySql:
To get the field.
select FIELDNAME from TABLE
To search from that result set:
select FIELDNAME from TABLE where FIELDNAME like '%myvalue%'
The %'s are wild cards. This would return any value with myvalue in it.
Such as:
(amyvalue, bmyvalueb, I<3myvaluecompletely)
If you want this done in some language you need to provide a more verbose and detailed question.
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I have this table:
Well, When I execute this query:
SELECT * FROM users order by rp_bought desc limit 5
I get no errors but, The username, Raed is in the last place as Raed Has the Most Rp_Bought (1300)
Im Wondering Why is this Problem Occurring.
This would occur if rp_bought were stored as a string rather than as a number. In MySQL you can easily fix this by adding 0:
order by rp_bought + 0 desc
The + 0 is an easy way to convert from a string to a number (with no additional errors occurring).
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I've got a large database table and wanting to select rows in the column 'cat_id' containing the value "79", then replace all the values in a column called "system" with the value "6" for the selected rows.
This query will do that:
UPDATE `table` SET `system` = '6' WHERE `cat_id` = '79'
I could be misunderstanding you, but i think you are looking for a simple update:
UPDATE yourTable
SET system = 6
WHERE cat_id = 79;
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I have a database like this:-
state_name|district_name|id
jammu |kupwara |jk-01
kashmir |anantnag |jk-02
I want a mysql Query such that when
statename is selected (jammu), distname should be selected(kupwara) based on thier id.
If any one knows please help me out.Thanks in Advance
If I understood your question properly, then query should be like this
SELECT state_name,district_name from TableName WHERE id='jk-01' //you can have your specific id here
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I have a column with values like 24,25,26,27 and
I want to match 24 (or some other number).
I like to do it based on regex don't know how to do?
I want the matching should be clear like 24,25,26 should match with 24 not 243
You can take a look at
FIND_IN_SET
SELECT FIND_IN_SET('24','24,25,26 ');
Note Please don't store vales as comma separated instead normalize
your structure
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i have a mysql table with fields:
appName appVersion
i want to insert content into this fields if combination of appName and appVersion not exist in it.
In MySQL you have an option:
Create unique index by 2 columns appName, appVersion
Use INSERT IGNORE - this will skip INSERT if the corresponding record already exists in table