SQL is Structured Query Language is a database computer language designed for managing data in relational database management systems (RDBMS).
PostgreSQL is an object-relational database management system (ORDBMS).[1] It is released under a BSD-style license and is thus free software. As with many other open-source programs, PostgreSQL is not controlled by any single company, but has a global community of developers and companies to develop it.
SQLite is an ACID-compliant embedded relational database management system contained in a relatively small (~225 KB[1]) C programming library. The source code for SQLite is in the public domain.
MySQL (pronounced /maɪˌɛskjuːˈɛl/[1] My S-Q-L, or "My sequel" /maɪˈsiːkwəl/) is a relational database management system (RDBMS)[2] which has more than 6 million installations. [3] MySQL stands for "My Structured Query Language". The program runs as a server providing multi-user access to a number of databases.
What are the Threats in database security and integrity?
there are more than 5 threats to database security. I mention only 5 of them
1.Excessive Privilege Abuse
2.Privilege Elevation
3.Platform Vulnerabilities
4. SQL Injection
5.Weak Audit Trail
Advantages of pilot conversion?
If the new system fails or malfunctions, the old system is still in operation and hence, there is little to no data loss.
It allows the end-users to compare and evaluate the new system's efficiency against the old system.
Any users that are new to the system can be trained gradually as the system is implemented.
In DBMS you can have users who have only select access or with only select+update+insert access or with select+update+insert+delete access. These users may or may not be granted permissions to alter the table schema.
Also you can have administrators who can create/modify/delete tables
What is each row called in a database?
In database the data is stored in tables called database tables. These tables have rows and columns. Each row is called a tuple.
Disadvantage of manual database?
DIFFICUIT IN FINDING IN INFORMATION DIFFICUIT IN FINDING IN INFORMATION
What are the disadvantages of manual database?
Re-organizing and sorting the data plus adding data fields.
The System is designed for the enhancement or development of Computerized Payroll System for Q Works Construction. It includes the features that can Add Employees record, Edit Employees information, Delete Employees record, print / Save the Pay Slip of each employee and Updating Employees information as well as the Weekly Salary, Cash advance, the rate per day, overtime, Gross payment, Net pay, and Deduction such as withholding tax and SSS, adding up with a log-in log-out process for security purpose. Moreover, with help file can be used by the users to know how to use the payroll
What is the difference between QBE and SQL?
Query by Example (QBE) is a database query language for relational databases. A QBE parser parses the search query and looks for the keywords. A more formal query string, in languages such as SQL, is then generated, which is finally executed. However, when compared with a formal query, the results in the QBE system will be more variable.
SQL (Structured Query Language) SQL is a set-based, declarative query language, not an imperative language such as C or BASIC. However, there are extensions to Standard SQL which add procedural programming language functionality, such as control-of-flow constructs
What are the fields that you would expect to find in a database for a shop selling computer games?
List the fields that you would expect to find in a database for a shop selling computer games.
What is the definition of a hierarchical jurisdiction?
Hierarchical jurisdiction refers to
differences in court functions and court
responsibilities with regard to specific
cases
•Two types: original and appellate
- If a court has original jurisdiction then that
court has the authority to try a case and
decide it (the origin of the case)
- If a court has appellate jurisdiction then
that court has the authority to review cases
which have already been reviewed by
other courts
Cardinality is the number of attributes in the table.
How do you organize a round robin?
You look at all the people in the bracket.Then,you put everybody so they play or wrestle everybody
What is the Difference between dband dbm?
dBm is defined as power ratio in decibel (dB) referenced to one milliwatt (mW). It is an
abbreviation for dB with respect to 1 mW and the "m" in dBm stands for milliwatt.
dBm is different from dB. dBm represents absolute power, whereas in audio engineering the
decibel is usually a voltage ratio of two values and is used then to represent gain or attenuation
of an audio amplifier, or an audio damping pad.
What do you mean by transaction?
Definition of a transaction:
1. the act of transacting or the fact of being transacted. 2. an instance or process of transacting something. 3. something that is transacted, esp. a business agreement. 4. Psychology. an interaction of an individual with one or more other persons, esp. as influenced by their assumed relational roles of parent, child, or adult. 5. transactions, the published records of the proceedings, as papers read, addresses delivered, or discussions, at the meetings of a learned society or the like. Hope this helps but if not broaden your question.
Give an example of a database field?
This is a very simple explanation.
A database is a collection of schemas.
A schema is a collection of tables.
A table is a collection of possibly unlimited rows organized into fields or more commonly called columns. Think of a spread sheet.
For example an inventory table might have columns ITEM_NUMBER, ITEM_NAME, and ITEM_QUANTITY.
ITEM_NUMBER is defined to store only whole numbers
ITEM_NAME is defined to store only letters and numbers up to the length of 20
ITEM_QUANTITY is defined to store only whole numbers
Here is some possible sample data
ITEM_NUMBER * ITEM_NAME * ITEM_QUANTITY
1001 * Washer Brass * 5044
1002 * Screw 4x40 stainless * 5027
1003 * Screw 6x40 stainless * 4947
So, to answer your question, a database column (or field) belongs to a table and has attributes that describe the column and what can be stored in the column.
What are some examples of specialty databases?
Most companies keep track of their employees, their sales, inventory, etc etc. Pretty much every website that has you log in or post content stores all that information in a big database.
How do you insert record on visual web developer?
Insert apparently only works in the DetailView control, not in the GridView.
Also, I don't seem to be able to get edit to work with a View, only directly accessing a table data source.
A relational database consists of how many tables?
A relational DB can consist of any number of tables.
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Two or more tables to establish a relationship. You cannot have a relationship with yourself ...
Describe the dependency diagram and explain its purpose?
A dependency diagram is a visual representation of a dependency graph. Dependency diagrams are integral to software development, outlining the complex, interrelationships of various functional elements. Typically in a dependency diagram, arrows point from each module to other modules which they are dependent upon.The dependency diagram is used as an aid to normalization within database design.