Oracle

[Oracle problem set 4] ORA-00205 error in identifying controlfile Description: [oracle problem set] is the problem encountered by the master usually operate the database and solution. Statement execution: Indicates An error occurred while operating

Ora-01440: column to be modified must be empty to decrease precision or scale solve problem reason: the customer asked a field to support decimal point, the database at the beginning of the design only supports integer, in the alert statement to

ORACLE Database File System Analysis 1. files associated with the database file type and instances: 1. Parameter files: these files tell Oracle instances where to find control files. For example, the size of a memory structure. Files that make up

ORA-3136 error solved 1. parameter description: SQLNET. INBOUND_CONNECT_TIMEOUT is set to a value in seconds and determines how long a client has toprovide the necessary authentication information to a database. INBOUND_CONNECT_TIMEOUT_listenername

Check the deadlock table in Oracle. This SQL statement can be used to check which table is locked and which Session is used by the user. After the query is made, the Session can be killed by SELECT s. username, decode (l. type, 'TT', 'table lock',

Oracle journey (1) scheduled task settings use pl/SQL to log on to the oracle database. In procedures, create a scheduled task, manipulate the logon table, and insert daily data into the temporary table. The SQL statements for scheduled tasks are as

Stored Procedures for oracle Learning (2) Note 1. in oracle, the alias of a data table cannot be added as [html] select. appname from appinfo a; -- select a correctly. appname from appinfo as a; -- Error 2. in the stored procedure, when selecting a

Why cannot I roll back ddl statements in oracle? What is a DDL statement first. DDL statements are data definition statements, including creation, modification, and deletion of various data objects, and authorization. In Oracle, DDL statements are

The biggest difference between Oracle functions and PROCEDURE is that Oracle functions allow DML statements, but cannot be used for queries.Our commonly used functions include select max (a) from table. This call method cannot execute functions with

To export the table structure in oracle stored procedures, we need to reverse all the table structures in the database, including partition tables and non-partition tables. The fields involved include number, data, timestamp, varchar2, and char.

Compare the data types migrated from ORACLE to DB2 and Oracle. I will use some specific examples to demonstrate the differences between DB2 and Oracle in detail: 1. Date Oracle date usage: create table date_demo (day_demo varchar2 (25), actualDate

To_char and to_date Experience Sharing (I) Comparison of the following two methods: to_char (start_time, 'yyyy-mm-dd hh24: mi: ss ') = '2017-06-06 16:18:30 'and start_time = to_date ('2017-06-06 16:18:30', 'yyyy-mm-dd hh24: mi: ss ') the latter is

PRAGMA AUTONOMOUS_TRANSACTION: a self-made transaction database transaction is a unit operation. Either all operations are successful or all operations fail. In Oracle, a transaction starts from executing the first data management language (DML)

[Oracle] Data Guard-Redo transmission Data Guard mainly provides two services: 1) Redo transmission service: Transfers Redo logs of the Primay end to one or more Standby destinations. 2) Redo Application Service: The Redo log transmitted from Primay

Oracle statement-level triggers use historical data of operations in oracle. There are three types of triggers: Row-level triggers, statement triggers, and alternative triggers. Here we discuss statement triggers, because statement-level triggers do

How to compile invalid objects 1. Find INVALID objects: SELECT object_name, object_type FROM dba_objectsWHERE status = 'invalid'; 2. compile invalid objects: manually COMPILE: alter package pkg1 compile reuse settings; compile with PL/SQL Package:

Oracle Random Number 1. select * from (select * from staff order by dbms_random.random) where rownum

ORACLE management index: independent physical structure, pointer (book catalog, point to table data -- rowid) -- speed query/overload data update. -- OLTP: less indexes -- OLAP: more indexes -- B-tree balanced binary tree, nonleaf, leaf, only two

Oracle database 12c R1 installation documentTo quickly build a test environment for oracle database 12c, use oracle-validated-rpm/oracle-rdbms-server-11gR2-preinstall rpm to automatically configure the installation environment. Of course there are

How to install multiple versions of oracle Database on one host this article takes installing two versions of oracle Database on one host (oracle 10g/11g) as an example to give a brief introduction. The system environment uses ol5.8 and uses