Database Administrator

Inconsistent datatypes: expected-got CLOB error example The tester reported that an SQL statement can be executed normally in one of the test environments, but cannot be executed in another test environment. The error is: ORA-00932: inconsistent

The database reports an ORA-01839 Error The ZCGL database reports that the date of the month specified by the ORA-01839 is invalid when running the SQL statement The detailed SQL statement is simplified as follows: Select * From table_name

Expdp export error ORA-31693 & ORA-39826 The report library logic has an error:ORA-31693: Table data object "BI_ETL". "xxx" failed to load/unload and is being skipped due to error:ORA-02354: error in exporting/importing dataORA-39826: Direct path

ORA-00031-mark the session to terminate and kill the process at the OS level Reporting when killing a processORA-00031-mark the session to terminateHowever, viewing the v $ session view still exists, but the status is changed to killed and is not

A binary tree for DS Traversal In some applications of Binary Trees, it is often required to search for nodes with certain features in the tree, or to process all nodes in the tree one by one. This raises the issue of traversing a binary tree, that

Study of oracle lesson one, oraclelesson Oracle learning Part 1 1. oracle Introduction 1.1 common database categories Small databases: SQL server, access (Microsoft) Medium-sized databases: mysql (from Sweden) and sybase (sybase from the United

Solve the problem that mysql service cannot be started and Mysql is reinstalled in the last step. mysql step Mysql services are often the most troublesome and often need to be reinstalled. Many people cannot unload the residual files and cannot

PostgreSQL contains PM/AM Time Format Conversion to_timestamp, postgresql PostgreSQL help documentation 9.8. Data Type Formatting FunctionsThe specified sqlformatting functionsprovide a powerful set of tools for converting various data types

PowerDesigner15.1 tips (2) -- how to find official resources, powerdesigner15.1 Pd15.1 Tips 2-how to find official resourcesRead first Pd15.1 Tips 1Official Website First, you must know that PowerDesigner is sybase, and sybase is sap.Visit the

How to create DB2 user function easily by DB Query Analyzer 6.03, How to create DB2user function easily by DB Query Analyzer 6.03 Ma Genfeng (Guangdong Unitoll servicesinreceivated, Guangzhou510300)   AbstractThe latest version of DB QueryAnalyzer

MHA clears relay log (purge_relay_logs) and relaylogpurge By default, the slave database's relay logs in the MySQL database will be automatically deleted after the SQL thread is executed. However, in the MHA scenario, the recovery of some lagging

An error occurred while connecting to SQLServer. The SQL Server database automatically comes with Schneider building adopts the default windows login mode, so that we cannot remotely connect through the IP address, and now the modification method

Data Center reconstruction-why do we need to separate the card table from the student table and reconstruct it --- During the reconstruction of the fee-based database in the IDC room, the previous Studetn_Info was divided into Card_Info and

MySQL Study Notes _ Connect C ++/C to MySQL database in 12_Linux (2), _ 12_linuxmysql C ++/C in Linux connects to the MySQL database (2) -- return data SQL reference: The SQL statement that returns data is used to retrieve data records that meet

The source code of libcurl. The problem occurs when the library is compiled as a static link. Problems with compiling libcurl source code into a static Link Library are shown in: Solution: The specific steps are as follows: 1. Add a

Database and database LearningQuery Optimization It plays an important role in the relational database system.Relational query optimization is a key factor affecting RDBMS performance.Due to the high semantic level of relational expressions, the

Database and database LearningPhysical Design of databases The storage structure and access method of a database on physical devices are called the physical structure of a database. It depends on the selected database management system.The process

SQL Server Force Case sensitivity method, SQL case sensitivity1. Change a power system in the database to case sensitive. For example, if you want to modify the userPWD14 column in the table tb_TestTable400 ALTER TABLE tb_TestTable400ALTER COLUMN

Database and database Learning Logical design of Relational DatabaseHow to construct a data mode suitable for specific problemsTools for database Logic Design-Standardization Theory of relational databasesThe link mode consists of five parts: R (U,

Sqlserver locks a row of data, prohibit reading, modifying, and deleting, and a row In SQL transactions, you sometimes need to lock a row and release the row after the transaction is completed. Use with (ROWLOCK, UpdLock) to lock the current row.