Oracle 9i reported ORA-01036: Invalid variable name/Number

Oracle 9i reported ORA-01036: Invalid variable name/Number The The problem is the variable name. SQL method: @ username I use the Oracle database in the following way: username Just change to Oracle. Public StringInsertUser (UsersUser) { //

11g ASM Single Instance dbca error prcr-1006 crs-0259 prcr-1071

11g ASM Single Instance dbca error prcr-1006 crs-0259 prcr-1071 11g ASM dbca error prcr-1006 crs-0259 prcr-1071 When creating a single instance DB Using ASM, it appears when running DBCAPRCR-1006: Failed to add resource ora. orcl. db for orclPRCR-107

Simple MySQL database access using C language

Simple MySQL database access using C language Unlike Oracle, MYSQL databases do not support embedded SQL languages. However, it provides powerful C and C ++ support APIs. The C language API is in part 1 of the Reference Manual, and is independent of

Oracle password files and logon methods

Oracle password files and logon methods Preface: As we all know, the Oracle database has a password file, which is used to log on to the database and perform a series of mount and open operations when the database is not started; The experiment

Oracle Cluster physical configuration requirements and restrictions

Oracle Cluster physical configuration requirements and restrictions 1. Oracle Clusterware supports up to 100 nodes in a cluster on deployments running Oracle Database 10 grelease 2 (10.2) and later releases. In Versions later than 10.2, oracle

Common Oracle ASM commands

Common Oracle ASM commandsIn the Oracle RAC environment, run asmcmd with the grid account to enter the asm command mode, for example: [Grid @ oradb-node1 ~] $ Asmcmd ASMCMD>   ASMCMD> du // display all disk space occupied by the ASM file in the

ORA-00604 ORA-21700 error handling

ORA-00604 ORA-21700 error handling Delete SDE user (GIS map data user) report ORA-00604 ORA-21700 today, detailed steps are as follows: SQL> drop user SDE cascade; ERROR at line 1:ORA-00604: error occurred at recursive SQL level 2ORA-21700: object

How to solve ORA-12170 TNS connection timeout

How to solve ORA-12170 TNS connection timeout Recently, when I suddenly connected to the local Oracle database through plsql for a while, I reported that the ORA-12170 TNS connection timed out! The phenomenon is that the network is not connected

Oracle limits the number of connections and PROFILE of a user

Oracle limits the number of connections and PROFILE of a user Today, a colleague called to limit the number of connections of a user, which can be achieved through the Oracle PROFILE file. 1. View resource_limit parameters: SQL> show parameter

Use Java Sources in Oracle

Use Java Sources in Oracle The MD5 encryption usage in Oracle is not clear. The encryption results are different from the results in the program, so we have to move the methods in Java. STEP 1:Create or replace and compile java source named

Undo tablespace and redo logs

Undo tablespace and redo logs Differences between undo and redo and their respective functions 1. Features of undo data: 1. It is a backup before data modification, mainly to ensure the user's read consistency 2. generated when the transaction

Introduction to Oracle insert all statements

Introduction to Oracle insert all statements In Oracle, the insert ALL statement is described as follows: 1. insert all unconditionally Create table t1 (product_id NUMBER, product_name VARCHAR2 (80), month number ); Insert into t1 VALUES (111,

Oracle Database Development

Oracle Database Development In the Oracle database system, tables are the basic objects of databases, and all data in the database exists as tables. Environment-Oracle 11g I. Table typeCommon tables in Oracle Database systems include: heap

Full version of MySQL5.6 cluster configuration under Redhat6.5

Full version of MySQL5.6 cluster configuration under Redhat6.5 1. Prepare three servers 2. Install the Linux operating system for the three machines respectively (Oracle Linux/RHEL 6.5 x86_64bit) 3. Separate IP addresses Management node 192.168.1.110

[Oracle] ROWNUM and paging

[Oracle] ROWNUM and paging Rownum is a poor Oracle database, and its order increases progressively according to the order in which records are obtained from the table. Note that because records are stored unordered In the table, therefore, you

ORA-27054 error solved in two cases

ORA-27054 error solved in two cases In Linux, mount the storage on another aix machine to nfs in linux, and then use expdp to export data stored in the disk mounted to linux. An error is reported. ORA-27054: NFS file system where the file is created

Clever Use of xmltype to parse clob data

Clever Use of xmltype to parse clob data For clob data, xml format is used in many cases, but data query and processing is always insufficient. When conditions permit, if xmltype can be cleverly used for data processing, it is accidentally a

How to solve the problem that the maximum number of MySQL connections exceeds the limit

How to solve the problem that the maximum number of MySQL connections exceeds the limit Recently, the User database name has already more than 'max _ user_connections 'active connections error is reported on the website. It is necessary to study

Troubleshooting of abnormal shutdown of MySQL Slave

Troubleshooting of abnormal shutdown of MySQL Slave The production environment has a Master-Slave replication of MySQL. A while ago, the network of the data center was upgraded, but after a general network fault is recovered, you only need to start

DB2 SQL20321N solution instance

DB2 SQL20321N solution instance SQL20321N was reported during a recent DB2 database migration. Scenario: a clean environment, just installed with DB2, is expected to migrate an old DB2 database to this point. Perform cold backup at the source

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