Oracle

Just debut, here hope you Daniel guidance, hope here to become a platform for my growth! This blog I tell you about Oracle's architecture, but also a test of their own learning!Oralce memory is composed of SGA+PGA.The Oracle server is comprised of

Just debut, here hope you Daniel guidance, hope here to become a platform for my growth! This blog I tell you about Oracle's architecture, but also a test of their own learning!Oralce memory is composed of SGA+PGA.The Oracle server is comprised of

Only for learning, review, in case forget, warm so know new!This is mainly about is the ALTER the use of words. First of all, I have a table that is only for learning. This table does not have a primary key constraint, a non-null constraint, or a

When the structure of the index. We're going to build the index fast. It will be added parallel, plus parallel. This will parallel the column index.When the degree of parallelism index is accessed, the CBO you may consider running in parallel, which

1. After the Oracle database is installed, the remote cannot log on for the first time, and after entering the SYS user, the change will be effective thereafter.2, when TNS to read the configuration, if the environment variable has been configured

--Learning Database--Data Query Language: SELECT statement--Data manipulation language: DML, adding and deleting statements--Data definition language: DDL, adding and deleting tables (transactions are automatically committed)--Transaction control

Create a table to build a table statement:CREATETABLESc_district (IDNumber (10)NotNull, parent_idNumber (10), NAMEVARCHAR2 (255 BYTE)Notnull); alter table sc_district addconstraint SC_DISTRICT_PK primary key (ID)); alter table sc_district

Your own computer is slow, especially installed oracle10g, service on and off with BAT file operation Easy PointOpen service@echo offnet start ORACLESERVICEORCLnet start ORACLEDBCONSOLEORCLnet start Oracleoradb11g_home1tnslistenernet start

Player Information Table T:Player ID player name on team12344 T-Mac Rockets34323 Kobe LivingPlayer season score Table A, the fields are as follows:ID Player ID season average score01 34323 2013 3402 12344 2013 1203 43221 2013 2304 12344 2014 2005 432

issue : System.InvalidOperationException: BadImageFormatException is thrown when attempting to load the Oracle client library. This problem occurs if you are running in 64-bit mode with the 32-bit Oracle client component installed. --->

Create tablespace dsxzfw datafile ' D:\yangk\oraclespace\DSXZFW.ora ' size 1000m; Create a tablespace, and note that if you want to restore the database, the tablespace name must be the same as the space name at the time of backup (that is, the

(ext: http://www.cnblogs.com/yangy608/archive/2011/08/22/2148893.html)Create user test identified by "test"--creating TEST usersDefault Tablespace USERSTemporary tablespace TEMPProfile DEFAULT;Grant Connect,create view, resource to TEST;Grant

Index unique Scan: is a large scan for a unique index, it only applies to the destination SQL where the query is equivalent in the Where condition, because the scanned object is a unique index, scanning only the index height so many index blocks are

After the cluster is installed, restart the computer and the cluster will start up with the system. A lot of articles on the web are said to add a line in/etc/inittabH1:35:RESPAWN:/ETC/INIT.D/INIT.OHASD Run >/dev/null 2>&1But in the system I

To solve the problem that the self-connected query in Oracle is not suitable for manipulating large tables, the Connect by method is implemented. Oracle can be used with the start with ... The Connect by prior clause implements recursive queries,

Run the ASMCMA command as a grid user [Email protected] database]# su-grid11grac1-> ASMCA650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/71/5C/wKioL1XMbwSBwXMzAAGAHV7qvKw654.jpg "title=" ASM01. PNG "alt=" Wkiol1xmbwsbwxmzaagahv7qvkw65

To prevent users from concurrently accessing and modifying resources at the same time, Oracle uses different types of locks to control concurrent access to data to prevent disruptive interactions between users1, Lock tablecommon syntax for locking

I. OverviewUse the merge declaration to filter records from one or more tables or views for updating or inserting into a table or view. You can specify criteria to decide whether to perform an update operation or an insert operation into the target

Recently, because of project needs, I intend to write a batch program to update the table data in the database. Wrote 3 SQL files: A.sql,b.sql,c.sql, in these three files, implements the operation to create the table and insert data into the

In 12C, multiple indexes can be created on the same set of columns, but the types of multiple indexes are different. At the same moment, only one is visible. as Select from EMP; SQL> CREATE INDEX emp_tab_ix_01 on Emp_tab (job,hiredate); -- before