Asked by: Ermina Lemus
technology and computing databases

What is the use of ResultSetMetaData in Java?

43
ResultSetMetaData is an interface in java. sql package of JDBC API which is used to get the metadata about a ResultSet object. Whenever you query the database using SELECT statement, the result will be stored in a ResultSet object. Every ResultSet object is associated with one ResultSetMetaData object.


Likewise, what is getMetaData in Java?

The getMetaData() method of ResultSet interface retrieves the ResultSetMetaData object of the current ResultSet. This method returns a ResultSetMetaData object which holds the description of this ResultSet object's columns.

Secondly, what is the difference between ResultSet and ResultSetMetaData? ResultSetMetaData is a class that is used to find information about the ResultSet returned from a executeQuery call. It contains information about the number of columns, the types of data they contain, the names of the columns, and so on.

Accordingly, what is metadata in Java with example?

Given that metadata is a set of descriptive, structural and administrative data about a group of computer data (for example such as a database schema), Java Metadata Interface (or JMI) is a platform-neutral specification that defines the creation, storage, access, lookup and exchange of metadata in the Java programming

What returns a ResultSetMetaData object describing the ResultSet?

Commonly used methods of ResultSetMetaData interface. it returns the total number of columns in the ResultSet object. it returns the column name of the specified column index. it returns the column type name for the specified index.

Related Question Answers

Chara Yamni

Professional

What is JDBC connection?

JDBC (Java Database Connectivity) is the Java API that manages connecting to a database, issuing queries and commands, and handling result sets obtained from the database. Released as part of JDK 1.1 in 1997, JDBC was one of the first components developed for the Java persistence layer.

Nandini Babeshkin

Professional

What is result set in JDBC?

JDBC - Result Sets. ResultSet interface represents the result set of a database query. A ResultSet object maintains a cursor that points to the current row in the result set. The term "result set" refers to the row and column data contained in a ResultSet object.

Carson Cartagena

Professional

What is SQL ResultSet?

An SQL result set is a set of rows from a database, as well as metadata about the query such as the column names, and the types and sizes of each column. Depending on the database system, the number of rows in the result set may or may not be known.

Milda Zharikov

Explainer

What is ResultSet in JDBC with example?

A ResultSet object is a table of data representing a database result set, which is usually generated by executing a statement that queries the database. For example, the CoffeeTables. viewTable method creates a ResultSet , rs , when it executes the query through the Statement object, stmt .

Wladimiro Pagadigorria

Explainer

Which of the following function gives you the ResultSetMetaData object?

ResultSetMetaData is an interface in java. sql package of JDBC API which is used to get the metadata about a ResultSet object. This object will have all the meta data about a ResultSet object like schema name, table name, number of columns, column name, datatype of a column etc.

Darc Introna

Explainer

What is meta Java?

Generally in Java, an annotation is termed as meta-annotation if it is used on another annotation. You have probably seen such annotations many times. There's no specific declaration needed for an annotation to become a meta-annotation, i.e. any annotation which has declared its @Target with ElementType.

Haroon Depp

Pundit

What is metadata and why is it important?

Metadata is essential for maintaining historical records of long-term data sets, making up for inconsistencies that can occur in documenting data, personnel and methods. Comprehensive metadata can also enable data sets designed for a single purpose to be reused for other purposes and over the longer term.

Regis Almeda

Pundit

What is ismeta data?

Metadata is data that describes other data. Meta is a prefix that -- in most information technology usages -- means "an underlying definition or description." Metadata summarizes basic information about data, which can make finding and working with particular instances of data easier.

Leann Pochinkov

Pundit

What is Servlet and its use?

A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers.

Mahamed Cidade

Pundit

What is meant by annotation in Java?

In the Java computer programming language, an annotation is a form of syntactic metadata that can be added to Java source code. Classes, methods, variables, parameters and Java packages may be annotated.

Raleigh Grosu

Pundit

What are constraints in Java?

Annotations can be determined with help of Java Reflection. Constraints are business rules which are to be applied on classes and/or fields (properties) of the class. For example, if the business rule mandates that the user name may never be null, then you'd like to put the @NotNull annotation to define the constraint.

Jon Nobr

Teacher

What is metadata in DBMS?

Metadata is data about data (see those examples to better understand this concept). In case of relational databases metadata refers to information on their schema and all the other information regarding access, storage, built in programs or any other information about database elements or usage.

Rosilda Nawal

Teacher

What is metadata in HTML?

Metadata is data (information) about data. The <meta> tag provides metadata about the HTML document. Metadata will not be displayed on the page, but will be machine parsable. Meta elements are typically used to specify page description, keywords, author of the document, last modified, and other metadata.

Naser Oatway

Teacher

What is metadata What are the classes in JDBC that supports metadata?

This information is called metadata, and JDBC provides two classes for dealing with it: DatabaseMetaData and ResultSetMetaData. If you are developing a JDBC application that will be deployed outside a known environment, you need to be familiar with these interfaces.

Yohanny Hauck

Teacher

What is statement and ResultSet in JDBC?

The SELECT statement is the standard way to select rows from a database and view them in a result set. The java. sql. ResultSet interface represents the result set of a database query. A ResultSet object maintains a cursor that points to the current row in the result set.

Achucha Serw

Reviewer

What is the difference between statement and PreparedStatement in JDBC?

Statement is used for executing a static SQL statement in java JDBC. PreparedStatement is used for executing a precompiled SQL statement in java JDBC. sql. PreparedStatement can be executed repeatedly, it can accept different parameters at runtime in java JDBC.

Noara Armenteros

Reviewer

Which method of the ResultSet is used to determine whether a value retrieved is null or not?

The wasNull() method of the ResultSet interface determines whether the last column read had a Null value. i.e. whenever you read the contents of a column of the ResultSet using the getter methods (getInt(), getString etc) you can determine whether it (column) contains null values, using the wasNull() method.