What is the database used by Quora?

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What is the database used by Quora?

Originally Answered: What database system does Quora use to store its questions and answers? Quora uses MySQL as its database. If you check here Quora’s Tech Stack | StackShare , it gives complete information on Quora’s stack and it shows that it uses MySQL as database and Memcached as the caching system for data.

How do you add a comment to a database?

Comments

  1. Begin the comment with a slash and an asterisk (/*). Proceed with the text of the comment. This text can span multiple lines. End the comment with an asterisk and a slash (*/).
  2. Begin the comment with — (two hyphens). Proceed with the text of the comment. This text cannot extend to a new line.

What is a good database design?

A good database design is, therefore, one that: Divides your information into subject-based tables to reduce redundant data. Provides Access with the information it requires to join the information in the tables together as needed. Helps support and ensure the accuracy and integrity of your information.

What database does YouTube use for comments?

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They are using mysql with Bigdata. The user information such has who uploaded the file,file information all will be stored in mysql and data will be stored in Bigdata.

What are examples of a database?

Some examples of popular database software or DBMSs include MySQL, Microsoft Access, Microsoft SQL Server, FileMaker Pro, Oracle Database, and dBASE.

What is database give some examples of database applications?

Examples of database applications

  • Amazon.
  • Student Data.
  • CNN.
  • eBay.
  • Facebook.
  • Fandango.
  • Filemaker (Mac OS)
  • LibreOffice Base.

How do I make comments in MySQL?

In MySQL, a comment started with — symbol is similar to a comment starting with # symbol. When using the — symbol, the comment must be at the end of a line in your SQL statement with a line break after it. This method of commenting can only span a single line within your SQL and must be at the end of the line.

How do I add a comment in mssql?

Comments can be inserted on a separate line or within a Transact-SQL statement. Multiple-line comments must be indicated by /* and */.

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What are the three types of database design?

Types of database models Relational model. Network model. Object-oriented database model.

Is MS Excel a relational database?

A database is an organized collection of data. There are many different kinds of databases, but the specific type of database SQL can communicate with is known as a relational database. Just as an Excel workbook is composed of spreadsheets, a relational database is composed of tables, like the one below.

Where are YouTube comments stored?

1. On the YouTube homepage, click on the three parallel lines at the top-left corner of the screen, then click the word “History” from the menu that appears. 2. On the right side of the screen, click the bubble beside the word “Comments.”

How do you handle YouTube comments?

In the YouTube studio section, click the three dots right next to the like, dislike and heart options. From there, you’ll have the option to click the red flag and report a comment. If you do so, make sure that the post is in clear violation of YouTube’s guidelines, otherwise, the platform is unlikely to take action.

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How to get the comment ID of a comment in SQL?

Using this idea, the following sql will show the comments and the ‘reply’ to each comment for each reply that has a comment: select c.comment, r.comment as reply from comment as c, comment as r, replyto as rt where c.ID = rt.CommentID and r.ID = rt.ReplyID

Is there a normalised version of the comment table?

However, to go with a normalised version, still keep the one Comments table (with no ParentID), and create a ReplyTo table which has a CommentID, and a ResponseID, both of which are the IDs of the records in the Comments table.

How to check if a post is a comment or reply?

20 You could just use one table, which includes a ParentID field. If the record has no value, it is a comment, otherwise it is a reply (to either a comment or a reply). You could query the record’s ParentID record (inspect it’sParentID) to see if this reply is to a comment or a reply.