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Name the two major reasons for choosing to use a database rather than a spreadsheet: [blank_start]organize and keep track of things[blank_end] and [blank_start]keep track of multiple themes[blank_end],
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A database is made up of [blank_start]columns[blank_end] and [blank_start]rows.[blank_end]
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Columns are also known as [blank_start]fields[blank_end] while rows are also known as [blank_start]records.[blank_end]
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A field is made up of a group of
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Rows are also known as Fields
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The components of a database are: [blank_start]tables (or files)[blank_end], [blank_start]the relationships among the rows[blank_end] and [blank_start]metadata[blank_end].
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A database uses a [blank_start]key[blank_end] which is found in every record.
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To remain [blank_start]ethical[blank_end], queries must be limited to determine only information required to run the business.
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Metadata is data about [blank_start]data.[blank_end]
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The following are Database Management Systems (DBMS) which must be licensed from the vendor.
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DB2
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Access
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MySQL
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SQL Server
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Oracle Database
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User permissions will allow a user to perform none, some, or all of the following operations:
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Read
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Insert
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Modify
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Delete
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In order to query a database, most popular DBMSs use:
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One of thethree main duties of a database administrator are: Setting up a security system which involves [blank_start]user accounts[blank_end], [blank_start]passwords[blank_end] and [blank_start]permission[blank_end].
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user accounts
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passwords
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permission
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Permissions determine who can [blank_start]insert[blank_end], [blank_start]read[blank_end], [blank_start]change[blank_end] and [blank_start]delete[blank_end] data.
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change
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insert
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read
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delete
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A database security system involves creating [blank_start]user accounts[blank_end], [blank_start]password rules[blank_end], [blank_start]permissions[blank_end] and [blank_start]processing limits[blank_end].
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password rules
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permissions
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processing limits
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user accounts
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A database administrator has four main categories of tasks. They are: [blank_start]development[blank_end], [blank_start]operation[blank_end], [blank_start]backup and recovery[blank_end] and [blank_start]adaptation[blank_end].
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development
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operation
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backup and recovery
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adaptation
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A problem tracking system is created for the [blank_start]operation[blank_end] phase. A change tracking system is created for the [blank_start]adaptation[blank_end] phase.
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Forms make it easier for users to:
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View data
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Insert new data
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Update existing data
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Delete existing data
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Run reports
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Queries allow users to search for data in an efficient manner.
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Reports are less structured than queries.
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Application programs query the database on behalf of the user.
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A dynamic content report allows the user to click on a field to [blank_start]produce other reports[blank_end] or [blank_start]take other actions.[blank_end]
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produce other reports
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take other actions.
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Multi-user processing problems occur when two or more users are simultaneously changing the same data.
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Data models are used to determine entities and their relationships. These are required for [blank_start]efficient[blank_end] database design.
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A student's date of birth is an entity.
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An identifier (or key) must be unique.
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Each attribute has and entity.
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1:N signifies a [blank_start]one-to-many[blank_end] relationship.
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N:M signifies a [blank_start]many-to-many[blank_end] relationship.
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A vertical bar on a crow's foot diagram means that one entity is required.
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A small oval on a crow's foot diagram signifies that the relationship need not have an entity of that type.
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The normalization of a data model means converting [blank_start]one poorly structured table[blank_end] into [blank_start]two or more well structured tables[blank_end].
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Data integrity problems can result in:
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Loss of confidence in the information
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Incorrect or inconsistent information
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A poor reputation for the system
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Raises for everyone
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Combining two tables into one can create problems with [blank_start]data integrity[blank_end].
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Each entity should have its own [blank_start]table[blank_end] with one [blank_start]attribute[blank_end] in each [blank_start]column[blank_end].
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The final judge of whether a data model is accurate is
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A new types of DBMS called [blank_start]NoSQL[blank_end] is becoming popular in situations where relational models aren't needed or don't fit.
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The three main attributes of NoSQL are that it supports [blank_start]very high transaction rates[blank_end], [blank_start]relatively simple data structures[blank_end] and can be replicated on many servers in the cloud.
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Examples of NoSQL are [blank_start]Dynamo[blank_end], [blank_start]Bigtable[blank_end] and [blank_start]Cassandra[blank_end].
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Dynamo
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Bigtable
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Cassandra
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Conversion to NoSQL is being done by many companies because it is easy to learn and easy to convert older systems.
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SQL injection is one of the most common form of attacks.