A constraint is a rule that is applied to a column in a table to ensure that the data in the column meets certain requirements. There are several types of constraints in SQL, including NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN ...Read more
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A transaction is a set of SQL statements that are executed as a single unit of work. It allows multiple changes to be made to the database in a way that ensures data integrity.
A view is a virtual table that is created based on the result of a query, while a table is a physical object that stores data in a database. Views are used to provide a customized view of the data ...Read more
If you accidentally added a file or files using git add that you didn’t intend to include in your commit, you can undo the add operation by using the following command: git reset <file> Replace <file> with the name of the file ...Read more
No, JSON does not support comments. According to the official JSON specification, comments are not allowed in JSON files. Any comments included in a JSON file will result in a syntax error when the file is parsed. However, you can ...Read more