JDBC requires separate get and/or set call statements for each bind variable and specifies the binding by position number. SQLJ provides strong typing of query outputs and return parameters and allows type-checking on calls. JDBC passes values to and from SQL without compile-time type checking. SQLJ provides simplified rules for calling SQL stored procedures and functions. …
Here are some of the advantages that SQLJ offers over coding directly in JDBC: SQLJ programs require fewer lines of code than JDBC programs. They are shorter, and hence easier to debug. SQLJ can perform syntactic and semantic checking on the code, using database connections at compile time. SQLJ provides strong type-checking of query results and other return …
Jan 23, 2021 · 1 Approved Answer. ANS 2. JDBC stands for java database connectivity and is an interface that allowsa java program to easily connect to a database system. whereas SQLJ is a tool that allows SQL to be directly embedded to a java program.SQLJ provides embedded SQL statements which are static in nature thus need to be preprocessed and precompiled.for …
The main difference between JDBC and SQLJ is that while JDBC provides access through dynamic SQL, SQLJ provides access through embedded static, SQL. Thus the traditional benefits of static SQL for Java language programs are all provided by …
The JDBC API provides a call-level API for SQL-based database access .#N#JDBC technology allows you to use the Java programming language to exploit "Write Once, Run Anywhere" capabilities for applications that require access to enterprise data. With a JDBC technology-enabled driver, you can connect all corporate data even in a heterogeneous environment.#N#—Refer to java.sql for various JDBC specs (4.3, 4.2, 4.2, etc.,) summary in JDK 11#N#—Refer to complete JDBC specs at jcp.org
While all Oracle JDBC drivers are similar, some features apply only to JDBC OCI driver s and some apply only to the JDBC Thin driver.#N#JDBC Thin client-side driver: This is a JDBC Type 4 driver that uses Java to connect directly to Oracle. It implements Oracle's SQL*Net Net8 and TTC adapters using its own TCP/IP based Java socket implementation. The JDBC Thin driver does not require Oracle client software to be installed, but does require the server to be configured with a TCP/IP listener. We recommend all of our customers to use JDBC Thin driver as most of the new features are developed only on JDBC Thin driver. Because it is written entirely in Java, this driver is platform-independent.#N#JDBC Thin server-side driver: This is another JDBC Type 4 driver that uses Java to connect directly to Oracle. This driver is used internally within the Oracle database. This driver offers the same functionality as the client-side JDBC Thin driver (above), but runs inside an Oracle database and is used to access remote databases. Because it is written entirely in Java, this driver is platform-independent.#N#JDBC OCI client-side driver: This is a JDBC Type 2 driver that uses Java native methods to call entry points in an underlying C library. That C library, called OCI (Oracle Call Interface), interacts with an Oracle database. The JDBC OCI driver requires an Oracle client installation of the same version as the driver.#N#The use of native methods makes the JDBC OCI driver platform specific. Oracle supports Solaris, Windows, and many other platforms.#N#This JDBC OCI driver is available for install with the OCI Instant Client feature, which does not require a complete Oracle client-installation. Please refer to Oracle Call Interface for more information.#N#JDBC Server-Side Internal driver: This is another JDBC Type 2 driver that uses Java native methods to call entry points in an underlying C library. That C library is part of the Oracle server process and communicates directly with the internal SQL engine inside calls and thus avoiding any network traffic. This allows your Java code running in the server to access the underlying database in the fastest possible manner. It can only be used to access the same database. The use of native methods makes the JDBC Server-Side Internal driver platform specific. This server-side internal driver is fully consistent with the client-side drivers and supports the same features and extensions.
Which is faster, the Thin driver or the OCI driver?#N#As always, it depends. There are some applications where the the Thin driver is faster, some where the OCI driver is faster. As of 10.1.0, the Thin driver is probably slightly faster than the OCI driver. In cases when the client and server are the same type of hardware and OS, the OCI driver puts a little less load on the RDBMS, even though the Thin client is faster. The differences are usually small, less than 10%. Most of our customers use the Thin driver because of its easier administration. Your mileage may vary.
When should I use the Server Internal Driver?#N#You should use the Server Internal Driver when you access the database in a Java Stored Procedure. A Java Stored Procedure is a Java method that executes inside the Oracle RDBMS just like PL/SQL executes in the RDBMS. Because it is executing in the RDBMS, it is necessarily executing in a database session. The Server Internal Driver connection is the handle to that database session. So, if your code is running in a Java Stored Procedure and you want to access the database, use the Server Internal Driver, except on those rare occasions when you should use the Server Thin Driver.
What is defineColumnType and when should I use it?#N#defineColumnType is an Oracle JDBC extension that provides increased performance in some cases. In prior versions of Oracle JDBC, all of the drivers benefited from calls to defineColumnType but beginning in 10.1.0 the Thin driver no longer needs the information provided. The Thin driver achieves maximum performance without calls to defineColumnType. The OCI and Server-Side Internal drivers still get better performance when the application uses defineColumnType.#N#If your code is used with both the Thin and OCI drivers, you can disable the defineColumnType method when using the Thin by setting the connection property disableDefineColumnType to "true". This will make defineColumnType a NOOP. Do not set this connection property or else set it to "false" when using the OCI or Server-Side Internal drivers.#N#Define column type may also be used to change the type of the data. Or to limit the size of variable length data.#N#There is a new variation of this with a 4th parameter for form_of_use.
What is DBMS_LOB.ERASE doing?#N#It's just "clearing" a segment of the clob. It does *not* shorten the CLOB. So the length of the CLOB is the same before and after the ERASE. You can use DBMS_LOB.TRIM to make a CLOB shorter.
Can the Thin JDBC Driver be used to develop Java applications?#N#Yes, the thin JDBC Driver can be used to develop Java applications. Unlike the JDBC OCI driver, the Thin JDBC driver only works with TCP/IP-based networks. Users who are running applications on non-TCP/IP networks are encouraged to use the JDBC OCI driver.
Both are popular choices in the market; let us discuss some of the major difference :
After comparing JDBC vs ODBC over a range of factors, it can be concluded that these are the two important application programming interphase which helps the application to communicate between client side and server side across different databases, but at the same point of time, each one has its own pros and cons.
This has a been a guide to the top difference between JDBC and ODBC. Here we also discuss the key differences with infographics, and comparison table. You may also have a look at the following articles to learn more.