I have a table like this tbl_user first i want to update a row based on id now i want to get updated value of amount column i have applied this sql my question is can i combine both of above sql or any single query to achieve above task? Answer The best you could imitate is to use two
Tag: mysql
Streaming MySql ResultSet with fixed number of results at a time
I have MySql table with 16 millions records, because of some migration work I’m reading whole Mysql table. The following code is used for streaming large ResultSet in MySql statement = …
CSV to MySQl Import
i need to insert csv into mysql database in proper column. let say csv has header and then data A B C and Mysql has table with column C A B i need to know best way to insert csv data to mysql table Answer I believe you can use the following syntax for mysql: So you can build up
How To Update a Sql Table On Regular Interval [closed]
I have a Data table in my Sql Database and I want to update some entries in that table on 1 day(regular) interval. How can I do it
Does Order of Fields of Multi-Column Index in MySQL Matter
I know the importance of indexes and how order of joins can change performance. I’ve done a bunch of reading related to multi-column indexes and haven’t found the answer to my question. I’m curious if I do a multi-column index, if the order that they are specified matters at all. My guess is that it would not, and that the
mysql compare specific date
I have a table which contains a varchar field containing date like ’15 May 2015 – 03:10 am’ I have to compare all date in this table with the current date to retrieve row which are next the current …
Select from row to last row
Is it possible for me with MySQL to select the from a specific row to the end of the table, without knowing how many rows there are left? My query at the moment is: But I want to be able to something like: Can this be done? Answer Just use a large value like 999999999 that is going to be
MySQL #1064 Error DATETIME
I’m making a web based mail system, and I have to create a table with this code: MySQL says: #1064 – You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ”messages'( ‘ID’ INT(250) NOT NULL AUTO_INCREMENT, ‘To’ VARCHAR(250) NOT NULL,’ at line 1 Might
MySQL IN() Operator not working
How to use IN() Operator not working it’s. Those table are example and look the same as the real database I have.I don’t have the permitting to add tables or change Those are the tables: When I use this query it return me only the student with id =1 because “id IN (students)” return 1 when the first value are
How do I use a subquery to show a column that has never been assigned to a different table?
I’m trying to Write a SELECT statement that returns the category_name column from the Categories table and returns one row for each category that has never been assigned to a product in the Products table. there are four categories in the categories table and only three have been used in the products table. How do i make it show the