Database Administrator

MuSQL imports and exports the entire database as a file MuSQL imports and exports the entire database as a file: ';} else {echo 'not insert into Table '. $ row [0]. '';} echo "The task is finished";} else {if (is_writable (DIR) {while ($ row =

Three methods for creating a user in MySQL There are three methods for creating a USER in mysql: The insert user table method, the create user method, and the GRANT method. I. Account Name Composition Account composition: User Name + host (So

Enq: CF-contention wait event Background description: The user reports that the database runs slowly, but the database returns to normal again when it is viewed. The AWR Report of the past period of time is decisively viewed; The AWR report

Oracle index management After the database has been running for a period of time, due to frequent addition, deletion, and modification, the index will produce fragments, and the query efficiency will naturally be affected when the fragmentation

MySQL string Truncation MySQL string Truncation 1. Extract strings from the leftLeft (str, length)Note: left (truncated field, truncated length)Example: select left (content, 200) as abstract from my_content_t 2. Extract strings from the rightRight (

Oracle 11 GB backup and recovery example of using RMAN to create backup Sets Oracle 11 GB backup and recovery example of using RMAN to create backup Sets -- % D: Specifies the name of the database -- % S: Specifies the backup set number. This number

MySQL 5.5 master-slave synchronization troubleshooting Slave_ SQL _Running: No mysql synchronization fault solution Slave_ SQL _Running: No mysql synchronization troubleshootingCheck the database today and find that a MySQL Slave is not synchronized

Processing of ORA-1455 errors reported when Oracle 11g exports data About the handling of ORA-1455 errors when Oracle 11g exports data, this exception may occur because the exported User table may have a NULL data table. First: View: SQL> show

Use SQL statements to add an auto-incrementing primary key or delete a primary key or an SQL primary key to a table. When I first met this requirement, I searched the internet and found that I couldn't do it. I had to delete the primary key column

Sed common usage summary, sed Summary Edit the text sed-I '1i xyz' test.txt before the first line sed-I '1a xyz' test.txt insert sed-I '1c xyz' test.txt after the first line replace row data with xyzsed '/^ bb/I \ kjdlfkjdslkf' temp.txt // Add a new

Sqlserver queries the number of tables in the database.Sqlserver query the number of tables in the database  SELECT * FROM sysobjects WHERE (xtype = 'U ') C = CHECK ConstraintsD = DEFAULT value or DEFAULT ConstraintF = foreign key constraintL =

Oracle Stored Procedure + cursor processing select data, oracle Stored Procedure Create or replacePROCEDURE UPDATE_RECORDCODE is cursor location_data is select * from location where remark in ('20160301', '20160301', '20160301'); -- declare the

IReport4.6.0 chart operation, ireport4.6.0 chart For reports, charts are indispensable. Even if you are tired of working on Monday ,,, Step 1: Create a new blank project and create a lot of online data from the data source. Step 2: On the iReport

QlikView format a cell, qlikview Cell You can create a pivot Table and a vertical Table or a general Table in QlikView. If the style of a cell is different from that of other cells, such as the color or Border width, you can use the following

Basic commands for oracle tablespace, basic commands for modifying the data table structure, and oracle Data Basic table space commands -- Create a tablespace. The initial size is 10 MB, and the maximum size is 5 MB. the maximum size is 50 MB.Create

QlikView charts show year-on-year data, and qlikview charts show year-on-year data. Data preparation is as follows: SalesData:LOADNum(ID) as ID,Date(Date) as Date,Month,Num(Year) as Year,Num(Sales) as SalesInline [ID, Date, Month, Year, Sales1, 2012-

Detailed process of manually adding a tablespace In the RAC environment, and manually adding a tablespace In the rac Environment ######################################## ###################### Detailed process of manually adding a tablespace In the

Two remote MySQL access problems: After MySQL is installed, it cannot be accessed remotely. Configure as follows: After the connection, the following error is reported: 1042-Can't get hostname for your address Solution: Add the following two lines

052 new question 1,052 Question 1 Answer: Large pool Optional area in the SGA that provides large memory allocations for backup and restore operations, I/O server processes, and session memory for theshared server and Oracle XA. Question about

Description of SQLNET. AUTHENTICATION_SERVICES authentication method, sqlnet. oraToday, I went to the customer's site for inspection. The customer proposed that the sys/system password should be modified to improve database security, and the default