SQL Quiz

SQL Quiz

You can test your SQL skills with W3Schools' Quiz.

The Test

The test contains 25 questions and there is no time limit.
The test is not official, it's just a nice way to see how much you know, or don't know, about SQL.

Count Your Score

You will get 1 point for each correct answer. At the end of the Quiz, your total score will be displayed. Maximum score is 25 points.

Comments

Post a Comment

Popular posts from this blog

What is Data Flow Diagram (DFD)

Image
Data Flow Diagram Symbols. DFD Library Data Flow Diagram Symbols. DFD Library Data Flow Diagrams graphically represent the information transfers and process steps of a system. They visually depict how data are processed by a system in terms of inputs and outputs, how occurs the input in a system, how the data flow through an information system and where they are stored, and how occurs output from the system. DFDs give the overview of the system and models the processes aspects, they are maintained with other methods of structured systems analysis. The main goal of DFDs is achievement of understanding between developers and users. For their construction are used two notations - Gane-Sarson and Yourdon, each of them uses its own set of symbols. Data Flow Diagrams solution from Software Development area extends the ConceptDraw PRO software with templates, samples, and predesigned libraries of data flow diagram symbols for both notations, allowing you...
Read more
Image
Data flow diagram Data flow diagram example. [1] A data flow diagram ( DFD ) is a graphical representation of the "flow" of data through an information system , modelling its process aspects. A DFD is often used as a preliminary step to create an overview of the system, which can later be elaborated. [2] DFDs can also be used for the visualization of data processing (structured design). A DFD shows what kind of information will be input to and output from the system, where the data will come from and go to, and where the data will be stored. It does not show information about the timing of process or information about whether processes will operate in sequence or in parallel (which is shown on a flowchart ). Contents 1 History 2 Theory 2.1 Physical DFD 3 See also 4 References 5 Further reading 6 External links History Larry Constantine , the original developer of structured design, [3] based on Martin and Estrin...
Read more

free NFTs is Giving By Reddit

Image
Reddit is giving away free NFTs: Here’s how to avail Qualifying Redditors will be able to choose from four distinct new styles of Collectible Avatars. Reddit banned a total of 2,000 of forums, or subreddits, most of which it said were inactive or had few users. (AP Photo/Tali Arbel) Reddit has announced air-dropping free Non-fungible-tokens (NFTs) to “top community builders” for their contributions to their Reddit communities. Qualifying Redditors will be able to choose from four distinct new styles of Collectible Avatars. There are four types of NFTs that are being offered for free including Aww Friends, Drip Squad, Meme Team, and The Singularity NFTs. These NFTs are also listed on the OpenSea NFT marketplace—the Singularity collection are selling for just over $15, while Drip Squad collectibles are worth over $42. How to avail a free NFT # Go to the Reddit home page. Make sure you only use desktop # Login to Reddit now # Scroll down a bit and if you are...
Read more