Oracle

1. jse6 and jdbc4.0 are supported, and the java. SQL. SQLXML type is no longer supported. Jse6 is supported by the ojdbc6.jar, ojdbc6_g.jar, ojdbc6dms. jar, and ojdbc6dms_g.jar files.2. Oracle. JDBC. Driver is no longer supported. Oracle. JDBC is

If Oracle is set to be inaccessible for a certain period of time, the connection will be automatically closed, so that when Java accesses Oracle again, an IO exception will occur.Solution: Add the following configuration information to the spring

  The concatenation operator is the double vertical line "|". The concatenation operator connects the strings of the two fields. Such as name and age 1. Select uname | age as "name and age" from uinfo;Select uname | age as "name and age" from

New Features of Oracle 10 GB-code obfuscation Author: Fuyuncat Source: Www.hellodba.com Before Oracle 9i, a command 'warp' was provided to encrypt the code. However, it is based on scripts in the command line mode. In 10 Gb,

----------- Step-by-step instructions for creating a logical standby database ----------- 1. Create a physical standby database (exsiting now) 2. Stop redo apply on the physical standby DatabaseExecuting the following statement in the sqlplus on the

Use logdump to view extract trail files (Getting Started) Use the logdump tool:Displays and searches for information in the goldengate trail file.You can save part of the information in the goldengate trail file to a separate trail file. 1. Start

Detailed description of Oracle database instance operations through JDBC This example uses jdbc2.0 and Oracle9i databases. The database is located on the local machine. Use the Scott mode that comes with the database. With detailed comments, I don't

The following table collects almost all views or aliases in the Oracle Data Dictionary. Use the 'describe' statement to query the fields of each view or Alias. Description: In the Oracle Data dictionary, the object names are mostly "user. "," All. ",

Preface We use Oracle databases for Project names. In terms of query and modification, there is no problem with SQL Server. However, we are new to users and are unfamiliar with it. For example, to create a tablespace and create a user, we also need

Three methods: 1. Restore using RMAN backup Automatic Backup of recovery Control FilesIf the recovery directory is not used, you should configure automatic backup of the control file to restore the control file quickly as needed. Whether or not the

  In Oracle, sequence is the so-called serial number, which is automatically increased every time it is obtained. It is generally used in places where the sequence numbers need to be sorted.1. Create SequenceFirst, you must have the create sequence

The first time I came into contact with Oracle databases, I felt that he had a lot of superiority over other databases. Especially in terms of running speed, I tried Oracle10g operations in Linux, the speed is more than 4 times faster than in

1. Absolute Value: ABS () Select ABS (-2) value from dual; 2. Take the entire function (large): Ceil () Select Ceil (-2.001) value from dual; (-2) 3. Take the entire function (small): floor () Select floor (-2.001) value from dual; (-3) 4. Take the

Last_day: returns the date of the last day of the month that contains the date parameter.Select last_day (sysdate) from dual; Last_day (sysdate) ------------------- 2008/02/29 11:24:04 SQL> select last_day (date '2017-02-15 ') from dual;

The database provides two field types: blob and clob, which are used to store large strings or binary data (slices ). Blob is stored in a single byte and is suitable for storing binary data and files.Clob uses multi-byte storage and is suitable for

This article is well written. I have made it very clear about the Oracle background principles. The 10 Gb I have installed on a virtual machine is the most common problem that clients cannot connect to the server, I have benefited a lot from this

To increase the query speed, generally: 1. Create a primary key for fields that do not need to be deleted; create an index for fields that may be deleted. 2. If you submit 5 million numbers at a time, each of them must be compared with the 90

The following articles mainly describe the synchronous replication of ORACLE Advanced Replication. If you need to set up related servers (Oracle) in several regions across the country ), the requirement is the consistency of related dB data. The

  Exists indicates that the results returned by the subquery statement in () are not null, indicating that the where condition is true, the primary SQL statement is executed. If it is null, the where condition is invalid, and the SQL statement is

Sometimes, for the synchronization of some tables in two Oracle databases, we can use the tables required by the source database exp and then execute imp import locally. Operation logic: first, execute the drop table command locally to delete the