oracle convert long to clob in select

Introduction to the long raw blob clob type in Oracle, blobclob Note: RAW: unprocessed type, which can store binary data or byte charactersLONG: variable-length string data. The maximum length is 2 GB. LONG has the VARCHAR2 column feature. It can

DescriptionRaw: Unprocessed type, can store binary data or byte charactersLong: variable long string data, longest 2g,long has VARCHAR2 column attributes, can store long text in one table up to a long column "not recommended"Long RAW: variable Long

In Oracle, table columns are changed from VARCHAR2 to CLOB and varchar2clob.Scenario The columns in the original table are defined as the VARCHAR2 type. As we all know, the maximum length of the VARCHAR2 type is 4000. If you want to convert this

Package com.study.db;Import Java.io.FileInputStream;Import java.io.IOException;Import Java.io.Reader;Import Java.io.Writer;Import java.sql.Connection;Import Java.sql.DriverManager;Import java.sql.PreparedStatement;Import Java.sql.ResultSet;Import

Java cannot directly insert Clob Data Types in Oracle, but it can write or read clob data in the form of a stream. The online code is not too much, I have summarized and summarized the online materials. For details, refer to the Code: Write clob

ScenarioThe columns in the original table are defined as VARCHAR2 types, and it is well known that the maximum support length for the VARCHAR2 type is 4000. Assume that because of business needs. To convert this column to the CLOB type, it is not

In Oracle, table columns are changed from VARCHAR2 type to CLOB type.Scenario The columns in the original table are defined as the VARCHAR2 type. As we all know, the maximum length of the VARCHAR2 type is 4000. If you want to convert this column to

ScenarioThe columns in the original table are defined as VARCHAR2 types, and it is well known that the maximum support length for the VARCHAR2 type is 4000. If you want to convert this column to a CLOB type due to business needs, it is not feasible

1 PackageReadclobdemo.bao;2 3 Importjava.io.IOException;4 ImportJava.io.Reader;5 ImportJava.sql.Clob;6 Importjava.sql.Connection;7 Importjava.sql.PreparedStatement;8 ImportJava.sql.ResultSet;9 Importjava.sql.SQLException;Ten One ImportJdbcutil.bao.

1. Insert the Clob field with an INSERT statement, and if the insert is more than 4000, the string is too long to be handled by first declaring the inserted fields as CLOB type, as follows:Insertsql = "DECLARE email_text clob: = '%s '; Begin INSERT