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to help understand the concept that is being underlayed
There are many codes on police reports. The most common are crime reporting codes used by the FBI to classify crimes and maintain the national database.
Grades
No, database software does not store data using Hyper Text Markup Language (HTML) codes. A common code used to access data is Structured Query Language (SQL). HTML is a formatting language that will tell a browser how to display the data retrieved from a database.
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Yes, Excel can be used as a database but not to the same extent as other applications. It is primarily a spreadsheet application, so it does not have all the facilities you might want if you are creating a database. Something like Oracle or MySQL or Microsoft Access are better suited to be used as a database.
using servlets, php, and database we can connect import codes into java
A simple field in this database would be the name of students, though first and last names are often separated into two fields.
They might be or they might not be. Since there are no codes displayed in the question, you can not tell.
SQL is not Database, it is a Language used to communicate with Database...
Bar codes are used on almost all the products we see in stores. The store uses that bar code to automate and speed checkout.
I would assume it was a relational database.. I also assume you mean the fingerprint database that is used by the police forces. as far as i am aware it is a relational database. I think because you could query either a name or a fingerprint reading and then get the information relating to it..Example: If you were looking for the name to a set of fingerprints, you would enter the finger print into your query, and then you might get a name if it is in the database, and if you were looking for the fingerprints to a guy, you would enter a name and you might get the fingerprints for him if you have the right name and it is contained within the database.
A query can be used to do things with the data. Mostly it is to extract information from the database, but they can also be used to delete, edit and update a database. Queries are very important and powerful aspect of a database.