When working with arrays, one common confusion developers face is the difference between Array.size() and Array.length. While they may sound similar, their usage and meaning vary depending on the programming language you are working with. In Java: Array.length is used to get the fixed number of elements in an array.…
Answered Aug 24, 2025 · 2.1K Views Read answer →
In SQL, when performing a LEFT JOIN, the placement of conditions using ON and WHERE can lead to different results. Understanding the distinction between them is crucial for accurate query outcomes. Using ON in a LEFT JOIN: The ON clause defines the condition for the join. It is used to match rows between the two…
Answered May 12, 2025 · 1.1K Views Read answer →
In order to write database-agnostic code there are various strategies that can enable seamless integration with a different and wide range of database systems. Among the various approaches, the best may use an Object-Relational Mapping (ORM) framework. The very useful benefit of using ORM is that it enables the…
Answered Nov 27, 2023 · 841 Views Read answer →
Severity level Use Case 1 to 10 These are used for information messages only. These are not error 11 to 16 These errors are occured due to user issues, and that can be rectified by user itself 17 In this case the SQL server is going out of resources or exceeding limit in case of disk space or lock limit 18 It will be…
Answered Jan 18, 2020 · 1.2K Views Read answer →
Below are few steps which can be followed in the procedure to optimize the query: 1. To count number of rows use “select count(1) from the table_name” or “select count(Primary_key) from the table_name” avoid using “select count(*) from the table_name” 2. Always select limited number of column for which data is…
Answered Jan 18, 2020 · 1.4K Views Read answer →
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