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, ...
With the rise of ChatGPT by OpenAI, the age-old process of SQL writing is being reimagined. While LLMs offers a modern approach to crafting SQL queries, it's essential to understand the tool's strengths and limitations to utilize it effectively. Let's dive into some of the advantages and...
After the Flink engine receives an SQL text, it parses it into a SqlNode using SqlParser. The Flink engine queries the metadata information in the catalog to verify the tables, fields, types, and UDFs in the SqlNode. After passing the verification, SqlNode is converted to LogicalPlan, and...
Stored procedures are a kind of reusable modules of SQL code that help to bring the complexity down and at the same time help to boost the performance. Create stored procedures that consolidate the most used queries into one database table (which doesn't reduce the development time but the t...
How to write SQL Query and running in parallel within stored procedure ? how to write string lines to a text file from a T-SQL script? How to: 1) Insert a range of values into a table with a single identity column 2) Rank the results without using any functions How To: Save a str...
For nested joins, the complexity is generally O(MN). This join is efficient when one or both of the tables are extremely small (for example, smaller than 10 records), which is a very common situation when evaluating queries because some subqueries are written to return only one row. ...
You should always ask yourself: “Is there a better way to write my query?” Let’s talk more in-depth about the reasons for that. Resource efficiency: Poorly optimized SQL queries would consume excessive system resources, like CPU and memory. This might lead to reduced overall system perform...
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...
In order to write a test case, one must have the requirements to derive inputs along with the test scenarios so that none of the features get missed out. Also, the test case template should be followed to maintain uniformity among the test cases. This makes it easy to report the defects...
everything else will be sent to HG1 (the default) DO NOT USE THESE RULES IN PRODUCTION, GENERIC READ/WRITE RULES LEAD TO PROBLEMS A better approach is to properly analyze the database workload and implement efficient rules, clear the previous rules once again: ...