Oracle

1.oracle querying the number of tables in the database:Select COUNT (*) from User_tablesThe premise of this operation is that the login is successful2.mysql querying the number of tables in the database:SELECT COUNT (*) TABLES, table_schema from

--------------------create temporary tables to temporarily save data parsed from an XML string---------------------------Session-Level staging tableSql> Create global temporary table Temp_order01 (OrderID number,ordernumber number,orderdate date) on

analytic functions are a new concept introduced in Oracle 8.1.6, providing a simple and efficient way to analyze data. in the analysis function previously, we had to use a self-query, subquery, or inline view, or even a complex stored procedure

Chapter II ASM INSTANCEthe type of ASM, for example, can be:The Oracle instance type adds an ASM category after 10g. The parameter instance_type=asm is set.ASM Instance startup command: Startup NomountLaunches the instance and background processes.

Oracle/plsql:Lpad FunctionThis is the Oracle/plsql lpad function with syntax and examples of the Oracle tutorial explains.DescriptionThe Oracle/plsql lpad function pads The left-side of a string with a specific set of characters if string1 is Not

http://blog.csdn.net/pan_tian/article/details/7754598 API to Find Sales Order's subtotal,discount,charges and tax (oe_oe_totals_summary. Order_totals) API for cancelling the Purchase Order (PO) Document (po_document_control_pub.

The use of decode in OracleDecode function usage in OracleMeaning explanation:Decode (condition, value 1, return value 1, value 2, return value 2,... Value N, return value N, default value)The function has the following meanings:IF condition = value

Summary of long types in Oracle1, a Long data type is stored in a variable length string, the maximum length limit is 2GB.2, for the text beyond a certain length, the basic can only be stored with a long type, the definition of many objects in the

This paper is mainly about the requirements of ORACLE11GR2 on system and physical configuration and the appropriate parameter adjustment.System:[Email protected] ~]# Cat/etc/system-releasecentos release 6.7 (Final)Kernel version:[Email protected] ~]#

If you need to install more database servers, it is still very slow and cumbersome to install the database software graphically. Oracle 11g provides a way to clone the installation.The steps are as follows: Use the normal method to install

Oracle LEFT JOIN, right connection, full outer join, and (+) sign usageOracle outer JOIN (OUTER join) Left OUTER join (the table on the left is unrestricted) Right outer join (the table on the right is unrestricted) All-out

After the Oracle database is installed, start the database as SQL Developer: The result is a small box prompting you to enter the full PathName for Java.exeFor this workaround:Locate the Java.exe file under the Oracle path that you installed, and

Attention:If String2 is not found in String1, the InStr function returns 0.Example:SELECT InStr (' Syranmo ', ' s ') from dual; --Return 1SELECT InStr (' Syranmo ', ' RA ') from dual; --Return 31 SELECT InStr (' Syran Mo ', ' a ', up to) from dual; -

If you use global temporary tables and sequence, you may encounter some problems. Because global temporary tables are associated with sessions (or transactions in a session), sequence is related to the database level.In 12C, you can create a

In fact, the basic process and most people on the Internet exactly the same, just add a few pictures on the back of the plsql, in order to make a record for themselves, in case the internet is not, here and there, will be the Omori (great God),

--Create TABLE spaceCREATE tablespace RH_DMRM (table space)DataFile ' G:\Oracle\data\dmrm1.dbf ' size 800M reuse autoextend on next 5M MaxSize Unlimited,' G:\Oracle\data\dmrm2.dbf ' size 20M reuse autoextend on next 5M MaxSize Unlimited,'

Rman not only can make the database, data files and other full-scale backup, but also can do incremental backup. Incremental backups have two major advantages: Reduce the time of database recovery.Database recovery uses archived logs to

Original Address--http://blog.csdn.net/qq525099302/article/details/47146067/*v_date ' yyyy-mm-dd ' format date string v_begin the relative minimum of a random date, in days, default 0v_end random date relative maximum, in days, default 1*/ Create or

Query database and instance names in oracleOracle: 1. query database name: select name, dbid from v $ database; or show parameter db_name; 2. query instance name: select instance_name from v $ instance; or show parameter instance_name; 3. query the

Oracle 11g database security reinforcement considerations, oracle11g In database security configuration, security reinforcement is required. To ensure database security, however, sometimes, after improper operations or database business account