Oracle

Two classic examples of Oracle triggershttp://blog.csdn.net/justdo2008/article/details/4137779"Case One"Topic:--Trigger:--Add employee information, serial number as auto number (generated by sequence),--and determine if the wage is less than 0,

Many friends in the development project not everyone with a database, but a separate host as a development database server, so that our developers need to connect it. The first is to enter Oracle's Net mananger;   The next step is to make a

SOURCE End: Oracle 11.1.0.7Target end:Oracle 11.2.0.4A recent data migration case encountered in the case of a VIEW after the data migration completed by the VALID State changed to INVALID. the VIEW creation statement obtained from the source

In general, it is not recommended to assign DBA authority after an Oracle normal user is created. So what permissions are generally assigned?First of all, an Oracle general user, our general requirements are:1. Be able to create the table structure,

1. System permissions1 SELECT *2 fromDba_sys_privs3 WHEREGRANTEE= 'lcam_sys_1216'4 UNION All5 SELECT *6 fromDba_sys_privs7 WHEREGRANTEEinch8(SELECTGranted_role fromDba_role_privsWHEREGRANTEE= 'lcam_sys_1216');System Permissions2. Object

Applicationcontext.xmlMybatis-config.xml Diclectresultsethandlerinterceptor.javaPackage Com.system.util;import Java.sql.statement;import Java.util.properties;import Org.apache.ibatis.executor.resultset.fastresultsethandler;import

Oracle Multi-Table Query 1 put multiple data into one fieldSelect Id,zhzxm,fzhzxm,ltrim (Max (Sys_connect_by_path (XM, ', ')), ', ') XMFrom (Select Id,zhzxm,fzhzxm,xm,row_number () over (partition by ID ORDER by LRSJ) RN--mark the same

SELECT * from(SELECT [pk_event_report_id] ,[fk_report_flow_id] ,[Event_report_kind] ,[Event_report_type] ,[event_report_org] ,[Event_report_number], Dense_rank () Over(Partition byevent_report_orgORDER by

Introduction to flashback flash back in oracle 1. You must set the undo retention time to be large enough to reconstruct the data that needs to be flashed back. Alter system set UNDO_RETENTION = The seconds value is the number of seconds for

Batch import data to Oracle databases SQL * LOADER is large data Repository selection method, because it provides the fastest way (DIRECT, PARALLEL ). Now, let's leave aside its theory and use instances to make You can quickly learn how to use SQL *

Significance of Oraclecreateindexon (colname, 0) Today, I saw an index, create index index_name tableanme (colname, 0). It's strange that I have never seen it before. After tests, it was found that it was an item relative to the Union Index and it

Oracle time function exploration, oracle Exploration I have recently used time functions. I want to take a note here to record my income and hope it will be helpful to you. 1. For a time such as sysdate: 14:16:03, how can I get only the year, month,

Use of Oracleexp/imp Import Export tool-1 The exp export tool compresses data backup in the database into a binary system file, which can be migrated between different operating systems. The imp import tool imports binary system files generated by

Oracle data type-2 5. NUMBERIt is used to store zero, positive, fixed-length negative, and floating point numbers. The NUMBER data type can be set to NUMBER (P, S) Format to define the precision and range of numbers. Here: p indicates the

Oracle Data Type-1In Oracle databases, each relational table consists of multiple columns. Assign a specific data type to each column to define the data type that will be stored in this column. 1. CHARA maximum of 2000 characters or bytes can be

ORA-02287: sequence numbers (sequencenumbernotallowedhere) are not allowed here to avoid and enforce implementation Scenario 1: SELECT id,name FROM (select SEQ_B_LOG_ID.NEXTVAL id , 'elong_deo' name from dual); Scenario 2: Insert into B

Oracle will you really use the ltrim/rtrim function? The common usage is to remove spaces. How many people do not know that they can actually remove spaces? It has the ltrim () and ltrim (x, y) methods. ------- Remove spaces on both sides, left

Use OCCI to access the Oracle database (4)   1. When executing Environment * env = Environment: createEnvironment ();, an exception is thrown, the Code is a ORA-32104, but there is no error message The reason is that the library used does not

Summary of ORACLEFLASHBACKDATABASE Flashback database is a very important feature of oracle databases. Compared with the function of retrieving historical versions of table data through undo and executing logical error recovery, flashback database

Personal notes-oracle Sequence select * from user_sequences select last_number from user_sequences where sequence_name='T_JGXX_POLY_SEQ';alter sequence T_JGXX_POLY_SEQ increment by 1;SELECT T_JGXX_POLY_SEQ.NEXTVAL FROM DUAL; Meger merge into