It is the same difference between an OR Boolean and AND Boolean. In an OR query, you are looking for something that matches one of several possible values, while in an AND query, you are looking for something that matches all of several possible values.
-- Find the first name of anyone in the USA, or have a last name starting with A.
SELECT FirstName FROM Contacts WHERE Country = 'USA' OR LastName LIKE 'A%'
-- Find the first name of anyone in the USA that also has a last name starting with A
SELECT FirstName FROM Contacts WHERE Country = 'USA' AND LastName LIKE 'A%'
The difference between these two is that the first one will return people outside the USA if their last name starts with an A, while in the second query, only people inside the USA with the last name starting with A will be returned.
AND will always return the same or fewer values than OR.
What is the Diff. Between Relational Algebra & Calculas? {| ! width="33%" | Point of Comparison |- ! width="33%" | R.Algebra ! width="33%" | R.Calculus | Is it Query Language ? YES YES Relation Query Describe step-by-step proceduar for computing the desired answer ,depend on the order in which operator are applies in query Describe the set of answer without being excplicit about how they should be computed Type Proceduar Non-proceduar |}
difference between as on and as at
Directly. Their difference IS the difference between them.
The difference is 2,795.
What are difference between scalars and vectors
A query (inquiry) is seeking information. A report provides information.
one of the difference is HQL does not support distinct but SQL supports the distinct in the query
The query is simple set of insert,update,delete statement where as transaction is a set of statement which follows ACID properties.
A simple search is one based on a single term or criterion.
a simple query is when you answer a database to do something and a complex/parameter query is a prompt to run a question to find something
SQL is Structured Query Language, and relates to databases. Excel is a spreadsheet application.
A query datasheet displays the results of a query operation, showing data based on specified criteria or calculations. A table datasheet displays the data in a table format, representing information stored in a database table. In essence, a query datasheet is derived from a table datasheet and is dynamic based on the query criteria.
in some cease both are the same they use query language but in fact the out puts are very deference
Query studio is a subset (in feature) of Report Studio. It is manily used for Ad-hoc queries. But report studio used for complex and fancy report development.
SQL is a universal query language used to access relational data. MySQL is a database storage engine which utilizes the SQL query language as the means to interface with the data stored.
SQL*PLUS is a interface between user and Oracle database. It Provide an environment to use the SQL which is a query language to communicate with oracle database
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