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i have a table with different names. i can order alphabetically, but i want to order it in different way.
For example: i want 'H' to be the first set of rows in the table, then 'D', then 'A' like that. how to pass this query in mysql?
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I have a query like:
SELECT * from table where column1=5 or column2=8
I need an alternative query to the above query. How is that possible?
I cannot guess the exact answer.
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I have value in a column of table like-
3,2,null,4,-1,-4,-2.
I want result like
4,3,2,null,-1,-2,-4.
You want NULL treated as a zero:
order by coalesce(column, 0) desc
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I have millions of data in my database table customer. In that, I have the id_token attribute which has value like cus00001 format now I want to change it to ank00001.
What will be the query in rails or mysql to do it for all the data in the database?
You can use simple update query using REPLACE function:
UPDATE `table_name` SET `id_token` = REPLACE(`id_token`, 'ank', 'cus');
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A table having duplicate record columns... I need to just show how many duplicate values present in that particular column...not unique values...Only Duplicate values should be displayed?
Do a count with groupby, and then filter the ones that have duplicates with having your_count_column > 1
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I'd have to make a SELECT ordering by first a column and then by another column... Is it possibile?
SELECT * FROM table_name ORDER BY colum1, column2