Oracle

Http://www.cnblogs.com/hanyun/archive/2009/05/14/1456772.html1). When using Oracle's To_date function for date conversion, it is possible to intuitively convert in "YYYY-MM-DD HH:mm:ss" format as a format, but in Oracle it causes an error: "ORA 01810

DOS Run command, can also add parameters in the Sql/plus environment to runSimple example implementationSingle-table backup (the structure of the premise library is the same)Export:Start button, run-and input cmd-> into the DOS interfaceEXP User

Null if no assignment is given and no default value Oracle allows fields of any one data type to be empty except for the following two cases: 1, primary key field (primary key), 2, field defined with a NOT NULL restriction conditionDescription: 1,

Delete users: Drop user pnxd cascade;Export DATA: Exp pnxd/[email protected] file=c:\bb.dmp full=yImport data: Imp pnxd/[email protected] file=c:\bb.dmp ignore=y full=yCreated by: Create user pnxd identified by padminAssign permissions: Grant

Chen Kozhan: http://blog.csdn.net/u013474104/article/details/44279309================1.spring Support for database accessWhen we develop a persistence layer, we face a variety of options, such as using JDBC, Hibernate, the Java Persistence API, or

First, the spool commonly used settingsSet ArraySize 5000; This parameter can increase the speed of the spool uninstallation, which can be set to a maximum of 5000Set autotrace on; Settings allow parsing of executed SQLSet Colsep ', '; Field Output

querying an existing database: select name from V$database;Unlock users Scott:alter user scott account unlock; Normal user connection: Conn Scott default password: Tiger General Administrator: System/system Super admin: Sys/sysdisconnecting:

3. Import and export of database (directly executed at command prompt cmd)Before Oracle 9i, use the IMP/EXP command to complete the import/export operation.3.1. Data export1 --fully export the database ORCL to the specified directory on the D

Table numbervarchar2 (tenvarchar2 (4 numbervarchar2); 2. Create a stored procedure with no parametersCreateOr replace procedureisbegin insert Span style= "color: #0000ff;" >into Test (id,name,sex,age) values (1, ' moses ' 3. Write C # code to

---oracle 10g1. In an Oracle database, data objects are organized and managed in a pattern. A pattern is a collection of logical data structures or objects in a series.2. The pattern corresponds to the user name, a pattern can only correspond to one

To upload an Excel data table to the Oracle database, proceed as follows:1. Open the local Excel file2. Connect Excel files with OLE DB3. Future data from Excel read into the dataset4. Insert data from DataSet into the corresponding table in

first question: driver name errorThe error is as follows:As you can see from the error message, Oracle writes less A ' a ', which is something that often happens to programmers, and sometimes it can be easily overlooked when it's time to detect

Here's an example:Select substr (' ll$ $BOAT $ $he very handsome ', 1, InStr (' ll$ $BOAT $ $he very handsome ', ' $$ ', 1, 1)-1), substr (' ll$ $BOAT $ $he very handsome ', InStr (' ll$ $BOAT $ $he very

I. What is a histogramA histogram is a geometric chart, which is based on the distribution of mass data collected from the production process, drawing a series of straight rectangular rectangles with a set distance of the bottom and a frequency as

Package COM.XIAN.JDBC;Import java.sql.Connection;Import Java.sql.DriverManager;Import java.sql.PreparedStatement;Import Java.sql.ResultSet;Import java.sql.SQLException;Import Javax.servlet.jsp.jstl.sql.Result;Import

Introduction many times, we call Oracle stored procedures to have a variety of exception information, such as ORA-12899 value is too large, ORA-01400 can not insert a null value and so on. Although this kind of anomaly is not in the front of the

Plsql cannot identify ORACLE_HOME solution on 64-bit ORACLE client1. Problems Plsql has only 32-bit programs so far, and most desktop systems use 64-bit windows operating systems. On 64-bit windows, in most cases, the 64-bit ORACLE client program is

Create a temporary tablespace group in oracleAfter oracle11g, you can create a temporary tablespace group. A temporary tablespace group can contain one or more temporary tablespaces.A temporary tablespace group must consist of at least one temporary

RMAN restores 32-bit database to 64-bit instance error handling, rman32-bit Restore the ORACLE 10g 32bit database to the database instance of ORACLE 10g 64bit on the test machine. After restoring and restoring the database, use open resetlogs to

Oracle statistics collectionCollect statistics 1: Create an analysis table $ Cd $ ORACLE_HOME/rdbms/admin $ sqlplus/as sysdba> @ utlxplan. SQL 2: For convenience, you can create a synonymous table (by default, only sys users can use it) SQL>