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Two types of compound criteria used in queries are?

And.. Or


What criteria are important in choosing a file organization?

file volatility, file activity, file size, file queries, data currency


Multiple conditions in a query or filter are called?

compound criteria


Why do we use queries?

Queries are used to request specific information from a database. They help extract data that meets certain criteria, filter out irrelevant information, and provide answers to specific questions. By utilizing queries, users can efficiently retrieve the data they need without having to manually search through the entire database.


How do you extract information from relational database?

You can extract information from a relational database using Structured Query Language (SQL) queries. By writing SQL queries, you can retrieve data by specifying the table, columns, conditions, and sorting options to meet your requirements. This allows you to extract specific information from the database based on your criteria.


What feature is used in Access to set criteria to select or sort data?

Humans decide what criteria is best for running Queries or Searches. If you display the database as a list of records then you can sort alphabetically from A to Z or the other way around


What are queries used for in database?

Queries are used in databases to retrieve specific information from the database based on certain criteria. They allow users to search, filter, and manipulate data to generate meaningful results. Queries help users analyze data, make decisions, and extract useful insights from the database.


What is the difference between hql and criteria?

HQL is to perform both select and non-select operations on data, but Criteria is only for selecting data, we can't perform non-select operations using criteria.HQL is suitable for executing static queries, where as Criteria is suitable for dynamic queries.HQL doesn't support pagination concept, but we can achieve pagination with Criteria.Criteria used to take more time to execute than HQL.With Criteria we are safe with SQL injection, because of its dynamic query operation, but in HQL as your queries are either fixed or parametrized , there is no safe for SQL injection.


What is the Purpose of queries in database?

The purpose of queries in a database is to retrieve specific information or data by filtering, sorting, and manipulating the database tables. Queries allow users to extract relevant data based on specified criteria without needing to search through the entire database manually. They are essential for data retrieval, analysis, and reporting in database management systems.


What is the difference between reports and queries?

query takes a table and given the criteria entered into it it displays the results that meet that search. While a report just spits out a table in the database


What is purity criteria?

The criteria of purity of a compund isÊdetermined at it melting point.ÊA pure compound a definate melting point. While an impure substance has an indefinate melting point.


Why do you create query?

Queries are one of the most powerful and important parts of database. You create databases to store data and retrieve information from them. Queries are the main way of retrieving information. You can show particular data or data that meets certain criteria. They can also do other things, like manipulate or delete data. There is a huge amount of things that can be done with queries. With practice and expertise they can be put to great use. Without queries databases would be practically useless. You would be able to store data, but not do much with it.