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I have a table with varchar column, this column contains both numeric records and AlphaNumeric records, but require only the ones that have no letters.
How can I achieve this?
Try this:
SELECT * FROM table WHERE `varcharcol1` RLIKE '^[0-9]+$'
tryed
SELECT column_name FROM table WHERE ISNUMERIC(column_name) = 1
select * from table where concat('', column * 1) = column;
Returns array of data, where column is numeric (contains only digits).
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I am php beginner.
I would like to read email contain in table 1 and with the value selected deleted the corresponding email of the table 2 ?
May you provide me some info to manage it ?
select email_table1 from table1.
delete from table2 where email = email_table1.
Thanks
Greg
There's little information to form an answer but you could use a sub select.
Something like this presuming you're using MySQL or similar.
DELETE FROM `table1` WHERE id = (
SELECT `referenceID` FROM `table2` WHERE `email` = 'the#email.com' LIMIT 1
) LIMIT 1;
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I have a table with multiple columns starting with one keyword link_. I.E. link_0_10, link_10_20, link_20_30 and so on.
I want to select only columns starting with these link_ keywords. How to do that? I can query by RegEx on the value, but on the columns? I have not been able to.
P.S.: I have no prior idea of how many columns may be present.
just change database name and table name with yours and run this query
SELECT `COLUMN_NAME`
FROM `INFORMATION_SCHEMA`.`COLUMNS`
WHERE `TABLE_SCHEMA`='database_name'
AND `TABLE_NAME`='table_name' and COLUMN_NAME like 'link_%'
SELECT *
FROM information_schema.columns
WHERE table_name = 'mytable' and column_name like 'link_%'
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I am using following,
select * , CONCAT_WS( row1.',' , combined_data) AS combined_data from table
Actually i looking the data like
row1 Value , row2 Value , row3 Value, ..
Please help me to resolve my problem
You can try like this..
select * , CONCAT_WS( ',',column_name1,colimn_name2) AS combined_data from table
The syntax for CONCAT_WS is
CONCAT_WS (separator, string1, string2,…)
Which is is used to join two or more strings with a separator.
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I'm looking to see if it is possible to select data from table A with a sort so the order of the data changes.
I then want to make a loop so it will go through each row and add it into table B.
Is this possible.
Use a variable #row_number to store the incremented num for your expected sorting.
SET #row_number = 0;
SELECT (#row_number:=#row_number + 1) AS num, Column1
FROM TableA
ORDER BY Column1
This result can be store in temporary table and based on that you can do loop/insert into the TableB
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I want to select those ids where staff id contain 3. Below is my database structure:
ID NAME Staff_ids
-----------------------
1 A 0,212,5
2 B 2,3,600
3 C 0,1,4
I want a query where I can select those ids having 3 in staff_ids column. How can I do that please help
You can use FIND_IN_SET.
Here is SQLFiddle Demo
Input :
Output:
SELECT * FROM table_name WHERE FIND_IN_SET('3',Staff_ids)>0
Hope this helps.
SELECT *
FROM ABC
WHERE Staff_id IN ('3');
Check if this helps