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What else can I help you with?
What is cardinality explain with example?
In SQL (Structured Query Language), the term cardinality refers to the uniqueness of data values contained in a particular column (attribute) of a database table.The lower the cardinality, the more duplicated elements in a column. Thus, a column with the lowest possible cardinality would have the same value for every row. SQL databases use cardinality to help determine the optimal query plan for a given query.
How can analogies help you?
They can help you to explain relationships in ways that are hard to explain in words.
What are the benefits of measures of central tendency Explain with an example?
"What are the benefits of measures of central tendency? Explain with an example
Explain the select Operation in Relational Algebra with an example?
Relational Algebra - Example
What does the highlighted 2-digit number represent in he above example?
I'm sorry, but I can't see the example you’re referring to. If you provide the context or details about the highlighted 2-digit number, I’d be happy to help explain what it represents.
Explain with help of an an example how FAT different from inode?
explain with help of an example, how FAT is different from inode.
A query language is an example of?
Any thing that has to do with database is a query lanquage. As in query the data to retrieve whatever you are looking for.
What is cardinality explain with example?
In SQL (Structured Query Language), the term cardinality refers to the uniqueness of data values contained in a particular column (attribute) of a database table.The lower the cardinality, the more duplicated elements in a column. Thus, a column with the lowest possible cardinality would have the same value for every row. SQL databases use cardinality to help determine the optimal query plan for a given query.
How the user requests for the required data is handled by DBMS explain with the help of example?
In a DBMS, the user requests for data by submitting queries written in a structured query language (SQL). These queries are then processed by the DBMS to locate and retrieve the requested data from the database tables. For example, a user can request all records of employees who work in a specific department by writing a SQL query that specifies the department's name and selects the relevant data fields. The DBMS then executes this query, retrieves the matching data from the database, and presents it to the user.
What is an unsafe query Give an example and explain why it is important to disallow such queries?
A query in which the output is possibly infinite. This most often occurs in queries which are recursive or which contain negation. Such queries are disallowed by many database management systems to prevent unsafe queries.
What is an unsafe query and Give an example and explain why it is important to disallow such queries?
An unsafe query is a query that is vulnerable to SQL injection, allowing malicious users to run unauthorized commands on a database. Example: "SELECT * FROM users WHERE username = 'admin' AND password = 'password' OR 1=1;". It's crucial to disallow such queries to prevent security breaches, data manipulation, unauthorized access to information, and potential damage to the database.
What is a select query?
Select query is a DRL. DRL stands for Data retrieval language. Example select * from table_name;
What is select query?
Select query is a DRL. DRL stands for Data retrieval language. Example select * from table_name;
What does QBE stand for?
QBE stands for Query by Example.
What is an example of an imperfect URL query?
http://ww.google.com
What is Normalization Explain the condition under which a relation needs to be normalized to 3 NF fro3 2 NF with the help of an example?
Define normalization explain the conditions under which a relation need to be normalized to 2nf and 3nf with the help of an example ?
What is the use of query by example?
A query by example is where you fill in data that in effect acts like a sample of what you want the query to retrieve. So if you have a set of data of employees and want to show ones that work in a particular department, you would type the name of the department into the query to correspond to the field that shows the department. So in the query, you would have chosen your fields, and in the criteria under the department field you might type something like "Sales", indicating that you want records that have "Sales" in the department field. What you type in acts as an example of the data you want to get. You could use lots of criteria in different ways and build more complex queries, but still using a query by example approach.
