When a Java application needs a database connection, one of the DriverManager.getConnection() methods is used to create a JDBC connection. Host database types which Java can convert to with a function JDBC connections are often managed via a connection pool rather than obtained directly from the driver. There is an extension to the basic JDBC API in the javax.sql. The row result set has metadata that describes the names of the columns and their types. There may be any number of rows in the result set. Individual columns in a row are retrieved either by name or by column number. The row result set is used to walk over the result set. Query statements return a JDBC row result set. These statements do not return any other information.
#Java mysql jdbc update
Update statements such as INSERT, UPDATE and DELETE return an update count that indicates how many rows were affected in the database. CallableStatement – used for executing stored procedures on the database.PreparedStatement – the statement is cached and then the execution path is pre-determined on the database server allowing it to be executed multiple times in an efficient manner.Statement – the statement is sent to the database server each and every time.JDBC represents statements using one of the following classes: Additionally, stored procedures may be invoked through a JDBC connection. These may be update statements such as SQL's CREATE, INSERT, UPDATE and DELETE, or they may be query statements such as SELECT. JDBC connections support creating and executing statements.
#Java mysql jdbc driver
The Driver Manager is used as a connection factory for creating JDBC connections. The API provides a mechanism for dynamically loading the correct Java packages and registering them with the JDBC Driver Manager. JDBC ('Java Database Connectivity') allows multiple implementations to exist and be used by the same application. The latest version, JDBC 4.3, is specified by a maintenance release 3 of JSR 221 and is included in Java SE 9. JDBC 4.2, is specified by a maintenance release 2 of JSR 221 and is included in Java SE 8. JDBC 4.1, is specified by a maintenance release 1 of JSR 221 and is included in Java SE 7. JSR 54 specifies JDBC 3.0 (included in J2SE 1.4), JSR 114 specifies the JDBC Rowset additions, and JSR 221 is the specification of JDBC 4.0 (included in Java SE 6). Starting with version 3.1, JDBC has been developed under the Java Community Process. The JDBC classes are contained in the Java package java.sql and javax.sql. Since then it has been part of the Java Platform, Standard Edition (Java SE). Sun Microsystems released JDBC as part of Java Development Kit (JDK) 1.1 on February 19, 1997.