You’ll also see that these anti-patterns stem from performance concerns and that, besides the “manual” approach to improving SQL queries, you can analyze your queries also in a more structured, in-depth way by making use of some other tools that help you to see the query plan; And, ...
In my career, I’ve heard many times, things like “How to write a complex SELECT query?”, “Where to start from?” or “This query looks so complex. How you’ve learned to write such complex queries?”. While I would like to think of myself as of a brilliant mind or genius or...
Session Manager in dbForge Studio We saw how to identify and kill queries using a regular MySQL console. Let's now do it indbForge Studio for MySQL- custom programs were build to make database administration plain, visual, and simple. Let's say, we are using Amazon RDS SQL instance and...
SQL Server log file corruption can happen at any time, causing many problems for SQL Server users. And one of the most common problems is the inability to access the database. Fixing a broken log file can be quite complex. You need to do multiple checks, try multiple solutions, and maybe...
To learn how to write an SQL query, let's use the following question: Who are the people with red hair in Massachusetts who were born in 2003? Using the SELECT command SELECT chooses the fields that you want displayed in your chart. This is the specific piece of information that you wan...
There are more and more tools on the market that can improve the effectiveness of data governance, and in addition to existing software vendors, new
There are numerous ways to write SQL queries, and different parameters you can attach to them. Some queries will be used more than others, and it’s important to make sure you use these efficiently, within the greater context of tuning your database more generally. One of the most commonly...
Get the Data Lineage of Complex SQL Statements in One Minute Data lineageis a very important link in enterprise data governance. For the important role of data lineage in enterprise data governance, you can refer toWhat’s Data Lineage and Why Is It So Important?. The SQL language is widely...
Debugging Recursive QueriesWrite a SQL query to debug a recursive Common Table Expression (CTE).Solution:-- Recursive CTE to calculate employee hierarchy. WITH EmployeeHierarchy AS ( SELECT EmployeeID, ManagerID, Name, 1 AS Level FROM Employees WHERE ManagerID IS NULL UNION ALL SELECT e.Employee...
So far we’ve assumed that you’re comparing plain tables. But everything in SQL is a table! Meaning these approaches also work when comparing query results. This enables you to use them to solve common challenges. How to compare complex queries ...