This means the MySQL query did not execute correctly. You can use this to figure out what went wrong: although in this case it seems the problem is that you have not enclosed table and column names within the required ` marks, so try
Does this include: International numbers? Extensions? Other information besides the actual number (like “ask for bobby”)? If all of these are no, I would use a 10 char field and strip out all non-numeric data. If the first is a yes and the other two are no, I’d use two varchar(50) fields, one for the … Read more
Take a look at this. Change your query to: The last select is your count.
Cast/Convert the values to a Date type for your group by.
I know this is an old question. The way I solved it – after failing by increasing the length or even changing to data type text – was creating an XLSX file and importing. It accurately detected the data type instead of setting all columns as varchar(50). Turns out nvarchar(255) for that column would have … Read more
This is an Array Formula. After entering the formula, press CTRL + Shift + Enter to have Excel evaluate it as an Array Formula. This returns the first nonblank value of the given range of cells. For your example, the formula is entered in the column with the header “a”
As far as I can tell, both syntaxes are equivalent. The first is SQL standard, the second is MySQL’s extension. So they should be exactly equivalent performance wise. http://dev.mysql.com/doc/refman/5.6/en/insert.html says: INSERT inserts new rows into an existing table. The INSERT … VALUES and INSERT … SET forms of the statement insert rows based on explicitly … Read more
Distinct and Group By are going to give you different results. To get the results you expect you’ll want to use Seen above, group will return things as a hash. While distinct just returns the number of people in total, seen below.
You can use mysqlcheck to do this at the command line. One database: All databases:
Please see in this SQLfiddle link, Link