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”
20 I encountered such a problem: Error Code: 1290. The MySQL server is running with the –secure-file-priv option so it cannot execute this statement when I tried to execute MySQL statement (Windows): When I execute it without: Then it works. Also, the same statement with INTO OUTFILE xxx actually worked before I reinstalled the MySQL … Read more
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 are comparing, not assigning: You compare values with == or ===. You assign values with =. You could write less code to achieve the same result too, with a switch statement, or just a bunch of ifs without the elseifs. I would make a function for it, like this:
You can use mysqlcheck to do this at the command line. One database: All databases:
Please see in this SQLfiddle link, Link
Assume a table structure of MyTable(KEY, datafield1, datafield2…). Often I want to either update an existing record, or insert a new record if it doesn’t exist. Essentially: What’s the best performing way to write this?
mysqladmin is not a SQL statement. It’s a little helper utility program you’ll find on your MySQL server… and “flush-hosts” is one of the things it can do. (“status” and “shutdown” are a couple of other things that come to mind). You type that command from a shell prompt. Alternately, from your query browser (such … Read more
There is no documented LEFT() function in Oracle. Find the full set here. Probably what you have is a user-defined function. You can check that easily enough by querying the data dictionary: But there is the question of why the stored procedure works and the query doesn’t. One possible solution is that the stored procedure is … Read more