Oracle

The first generation of Idcard is a 15-digit number, the second generation is a 18-digit number,New 18-digit idcard number what you mean: 1-2 provincial, autonomous, and municipality codes3-4 prefecture-level cities, leagues, Autonomous prefecture

In your database, the tablespaces is locally managed. You startedRecovery Manager (RMAN) using Recovery catalog and restored theControl file by using the following command:Rman> RESTORE Controlfile;Which-operations do you need-perform after

Oracle's fast way to import Excel data uses the Plsql Developer tool, which is the most common tool used by Oracle's most famous DBA.In cases where a single file is small (less than 100000 lines), and the destination table structure already

Number of fields in the--------------------------statistics--------------------SELECT COUNT (*) from User_tab_columns WHERE UPPER (table_name) = UPPER (' Tbbatchlog ')------------------------Create user and tablespace---------------------------------

--Create a sequence:CREATE SEQUENCE Seq_grelation--use unified prefix to make it easy to manageINCREMENT by 1-the self-increment step is set here to 1Start with 1--count start here set to 1Nomaxvalue--No maximum option is set maxvalue|

Kingdee BOS system table T_bas_message table is used to store system messages. In practice, the client defaults to 15-minute queries for new messages at a time The user is basically not going to delete the read message, which makes the table

Oracle and 2 months ago provided support for EF6. Previously only supported to EF5. EF6 has many useful features that are worth upgrading. Here's how to support OracleI. Oracle provides some basic knowledge about. NET Support.1. In the early days,

In the left join of SQL, you can add more than one condition on the right side of the link, and the following rules are found in the project development process.SELECT * from A LEFT join B on A.id=b.id and 1<>1;For this statement you think the query

Sqlplus/ asSYSDBA; (sqlplus user name/Password@ip: Port: DB instance assysdba;)SetLinesize +;(set how many columns to display, pagesize: -; How many records per page)Select * fromnls_database_parameters; (nls_language)Select *

1. The GROUP BY statement does not have a sort function in Oracle and must rely on order by to achieve the ordered results2, GROUP by cube extension1 withTest as2 (3 Select 1Id2Name fromDual4 )5 SelectId,name fromTestGroup byCube (id,name);6 7

The functions previously described in Oracle are string processing, date functions, mathematical functions, conversion functions, and so on, and a class of functions are general functions. Mainly: NVL,NVL2,NULLIF,COALESCE, these functions can be

13th chapter set operator 1.SET operator: union/union allINTERSECTminusThe 2.UNION operator returns a set of two query result setsSELECT employee_id, job_idFrom EmployeesUNIONSELECT employee_id, job_idFrom Job_history;2.1UNION All operator: Returns

In oracle11g, when each table is initially created, the default is to not allocate extents to this object.When the data is first inserted, the corresponding extents are assigned.The corresponding control parameter is Deferred_segment_creation=trueIf

Oracle millisecond conversion time The date string for data inventory today is like this: 1.3377024E12. I wanted to use the program background to convert it and then display it on the foreground. After thinking about it, you can search for the

Buffersort in Oracle execution plan The buffer sort in the Oracle execution plan is not actually sorted. It only loads data to the memory and does not scan tables multiple times. -- Manufacturing data drop table test purge; drop table test1 purge;

ORACLE-005: Create a JOB (2) How to Create a job with parameters. We can directly declare the parameters and assign values, and then pass them to the stored procedure called by the job. For example, the stored procedure named Pro_Test_JOB has one

Oracle (11) string function, oracle string I. String Functions LENGTH (char1, char2) Select length ('abc def gh') FROM dual; -- get the LENGTH of the string, containing spaces. Result: 10   CONCAT (char1, char2) Select concat ('abc', 'def ') FROM

Oracle BASICS (12) mathematical functions, oracle basics mathematical functions Mathematical functions: ABS (n): returns the absolute value. Select abs (-15), ABS (15) from dual; -- get the absolute value of 15 results: 15, 15   BITAND (X, Y):

Practice: oracletimesten11.2.2.7.0oncentos6.5 Entry level, but the steps are more detailed, there is no theory, can be used as an entry manual.   **************************************** * ******************************** 1. create a user ***********

[Oracle] oracledba8NOLOGGING You noticed that the index tablespace in your database requires Recovery. However, instead of discovery a media recovery, you decide D to re-create the indexes in a new tablespace. Which two options wou Ld you use to