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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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
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
To open a popup modal using Bootstrap, you’ll need to include the Bootstrap CDN and the necessary JavaScript code in your HTML file. Here are the steps:Include the Bootstrap CSS and JS files in the head section of your HTML ...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.
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