You’ll need to put your current query in subquery as below : Oracle applies rownum to the result after it has been returned.You need to filter the result after it has been returned, so a subquery is required. You can also use RANK() function to get Top-N results. For performance try using NOT EXISTS in place of NOT IN. See this for more.
You could use a SUM (not COUNT!) combined with a CASE statement, like this: Note: in my own test NULLs were not an issue, though this can be environment dependent. You could handle nulls such as:
Well the problem simply-put is that the SUM(TIME) for a specific SSN on your query is a single value, so it’s objecting to MAX as it makes no sense (The maximum of a single value is meaningless). Not sure what SQL database server you’re using but I suspect you want a query more like this … Read more
Starting from Oracle 12c R1 (12.1), there is a row limiting clause. It does not use familiar LIMIT syntax, but it can do the job better with more options. You can find the full syntax here. (Also read more on how this works internally in Oracle in this answer). To answer the original question, here’s the query: (For earlier Oracle versions, please … Read more
I’m getting this error msg 8115, level 16, state 2, line 18Arithmetic overflow error converting expression to data type int. with this SQL query
Use the INFORMATION_SCHEMA.TABLES view to get the list of tables. Generate Drop scripts in the select statement and drop it using Dynamic SQL: Sys.Tables Version Note: If you have any foreign Keys defined between tables then first run the below query to disable all foreign keys present in your database. For more information, check here.
I ran into this same problem with HeidiSQL. The error you receive is very cryptic. My problem ended up being that the foreign key column and the referencing column were not of the same type or length. The foreign key column was SMALLINT(5) UNSIGNED and the referenced column was INT(10) UNSIGNED. Once I made them both the same … Read more
I have installed MySQL server and trying to connect to it, but getting the error: I have checked my /tmp directory and there is no mysql.sock. I can’t find mysql.sock anywhere. I read that it might be in But I checked there as well and there is even no mysql directory, only some postfix thing … Read more
The criteria expression is the part of the query containing the conditions, as in WHERE <condition>. Look at those specifically. The error message means you’re comparing two things (this equals that, or this less than that, etc.) that are of two different, and incompatible types (comparing a number to a string, for example). You can find … Read more
Try: Check MySQL Options. Note 1: It is better to use the full path of the SQL file file.sql. Note 2: Use -R and –triggers to keep the routines and triggers of original database. They are not copied by default. Note 3 You may have to create the (empty) database from MySQL if it doesn’t exist already and the exported SQL don’t contain CREATE DATABASE (exported … Read more