Let's explore the Blue Ocean, Config File Provider and Groovy plugins with security vulnerabilities. Here's how to address them,. MySQL and Microsoft SQL Server relational databases have their pros and cons. Weigh the differences between SQL Server and MySQL. When you do division in SQL, there are two things to watch out for -- nulls and zero. You should anticipate both situations in your query. If the column was defined as NOT NULL, you don't have to worry about nulls, but if the column is "nullable" (i.e. defined as NULL, or not NOT NULL), you must be careful about dividing by a null value because the answer will be null. Sometimes that's okay, but often you'd like to exclude those rows from the query. Also, you sure wouldn't want to divide by zero, since that will cause either a data exception or a null value. So the best strategy is to check both conditions --. Doing SQL arithmetic with SELECT instead of arithmetic operations. Rise of headless CMS: Businesses move away from traditional WCM. Enhancing Security for State and Local Government Agencies. Tuning database performance is a complex process, but consultant Joey D'Antoni details a list of SQL Server performance tuning. Sisense acquisition of Periscope yields versatile BI platform. Cryptographic keys help improve security in your enterprise. Consider entropy as a way to safeguard your data and prevent hackers. How to use Oracle SQL CUBE for cross-tabulation. Ask the Experts yourself: Our SQL gurus are waiting to answer your toughest questions. ("But what if somebody hasn't had any at bats?" I can hear you asking. Well, they won't be in that result set. If they need to be, then you have to ask yourself what their hitting percentage should be. It can't be.000, can it? Would that be fair? One might say it was NULL, unknown, not applicable, indeterminate, or yet-to-be-decided. You can achieve this result, getting nulls wherever the divisor is zero, by removing the WHERE clause, but only if your database returns a null for an attempted division by zero (the proper behaviour, in my estimation), instead of hiccoughing an error message that informs you that you just tried to divide by zero. Then you wouldn't need to filter out the people who hadn't had any at bats yet. After all, filtering out rows based on zero conditions can get tiresome, especially since you have to do it in every query where you have a division calculation, such as hitting percentage, which you obviously want to calculate on the fly. You could build a view which has the filter condition built in -- this eliminates the problem of dividing by zero in SQL, but creates the situation where some people are missing from certain queries.). Tool in Oracle 10g to keep track of execution of queries. Meeting Corporate Requirements for Comprehensive Security for Users and Their. How do I use the ISNULL or NULLIF to avoid division by zero?. This email address doesn't appear to be valid. View all Oracle Database / Applications questions and answers. Please check the box if you want to proceed. NULLIF (expression, expression "): This function will return the same type whatever is specified as the first expression. Basically, NULLIF returns. Linux software is expanding its use cases for data center and cloud options. Red Hat CTO Chris Wright details how the company is. Gartner's talent market intelligence service found that 49% of all the job postings are for just 39 roles. Three of those roles. Using ISNULL or NULLIF to prevent division by zero.