oracle sql developer data modeler tutorial

[] varchar VARCHAR String tinyint TINYINT Short uniqueidentifier CHAR String Xml LongVarCharSQLXML (Java SE 6.0) StringSQLXML Time Time (1) Java.sql.Time (1) Date DATE Java.sql.Date DateTime2 TIMESTAMP Java.sql.Timestamp DateTimeOffset (2) Microsoft.sql.Types.DATETIMEOFFSET Microsoft.sql.DateTimeOff

name [and……>; Select field name 1, field name 2 ,...... From table name 1, [Table name 2,...> WhereTable Name 1. Field name = table name 2. Field name (+) [and…>; The position of a field with a (+) number is automatically null. Sort the query result set. The default sorting is ASC in ascending order and desc in descending order. Select field name 1, field name 2 ,...... From table name 1, [Table name 2,...>Orderby field name 1, field name 2 DESC; Fuzzy string comparison Instr (field

[Oracle] Data Pump detailed tutorial (3)-impdp [Oracle] Data Pump detailed tutorial (2)-expdp http://www.bkjia.com/database/201307/230731.html The import mode is the same as the export mode. The following five modes are also mutua

If you delete a data file in a tablespace before you oracle10g it, the file will still exist in the database data dictionary, and the file information will not be erased unless you delete the tablespace. But starting with ORACLE10GR2, Oracle allows us to completely delete an empty file without leaving traces. But note: If you add a file to the SYSTEM table space

For non-Data Guard patch installation tutorials, refer to [Oracle] CPU/PSU patch installation detailed tutorial. Data Guard requires both Primary and Standby patches, so the steps are more complex, the main steps are as follows:1. Stop the log transmission service in Primary;2. Shut down the Standby database, patch the

First, simple query SQL (structured query Language) Structured Query language is a database query and programming language for accessing data and querying, updating, and managing relational database systems. ANSI (American National Standards Institute) claims that SQL is the standard language for relational database management systems.Oracle databases have devel

If you delete a data file in a tablespace before Oracle10g, the file will still exist in the Database Data Dictionary. Unless you delete the tablespace, the file information will not be cleared. However, from oracle10gr2, Oracle allows us to completely delete an empty file without any trace. But note: if you wantSystemIf a file is added incorrectly in the t

As long as interaction is involved, it will certainly deal with data. Maybe there is not much such content on the Internet, no matter how many, each summary is experience-based, and is carefully prepared. As long as interaction is involved, it will certainly deal with data. Maybe there is not much such content on the Internet, no matter how many, each summary is experience-based, and is carefully prepared.

. 3.1 Creating synonyms CREATE [public] for object; -- Public creates a synonym that can be accessed by all users --synonym is the name of the synonym to be created --object that indicates which objects to create synonyms for The database administrator can create a public synonym that can be accessed by all users. The following example creates a public synonym for Scott's Dept table: CREATE Public synonym Dept_syn for scott.dept; Create a synonym instance 3.2 Deleting synonyms Delete a sy

Synchronize table data between Oracle and SQL Server Synchronize some tables in SQLServer2008 to the Oracle database. We can use the linked server and SQLAgent to synchronize data between different database types. Instance 1:SQLServer2008 has a table named "employ_epl" tha

Remember that PHP supports Oracle connection functions php.ini files in the configuration, remove; extention = Php_oci8.dll, remove the preceding semicolonYou can restart Apache,If not, we'll copy the Php_oci8.dll in the PHP directory to the system32 under Windows System.Oracle Database link creation code is as follows copy code 1. $conn = Oci_connect (' username ', ' password ', "(description= address= (PROTOCOL =t

Enter the DOS interface. Enter the SQL file directory. Run Sqlplus,c:\sql>sqlplus user_name/[email protected]_service_name at the command prompt Specify the SQL execution log file, log filename arbitrary, but must be a log suffix name: Sql>spool e:\temp\a.log Create a batch execution file. If you want to ex

Database development or management personnel often need to create a large amount of test data, and tens of thousands of data records are required. If one data entry is required, it will waste a lot of time, this article describes how to quickly generate a large amount of test data using an

]-> name, vec [I]-> passwd );Fwrite (buff, 1, iResult, pf );}Fclose (pf );}Cktool. end ();Printf ("cost % f \ n", cktool. getInterval ()); Vector For (; it! = Vec. end (); ++ it){Delete (* it );}Return 0;} Execution result: Cost 2.796853Cost 3.715381 Load data through SQL * Loader Compile the load. ctl File Load dataInfile 'Load. data'Into table base_usersFields terminated ","(Userid, username, passwd) Clea

I. Data Control Statement (DML) 1. INSERT (INSERT the record statement into the data table) Insert into Table Name (field name 1, field name 2 ,......) VALUES (value 1, value 2 ,......);Insert into Table Name (field name 1, field name 2 ,......) SELECT field name 1, field name 2 ,...... FROM another table name; Field Values of the string type must be enclosed in single quotes, for example, 'good Day' If the