oracle sql data modeler

/admin/profiler. SQL Runid run_date run_comment --------------------------------------------------------------- 1 08-feb-12 14:55:38 Dave testpl/SQL profiler 2 08-feb-12 15:03:11 Dave testpl/SQL profiler 3 08-feb-12 15:07:26 Dave testpl/SQL profiler 4 08-feb-12 15:09:40 Dave testpl/

Microsoft (China) Co., Ltd. announces: March 2001, Microsoft SQL Server 2000 continuously obtains three in the United States Awards, highly scalable data warehousing, business intelligence features are recognized; April 2001 Microsoft SQL Server 2000 The industry edition and Windows Datacenter Server have shown the latest in a series of industrial tests, includin

can create three procedures, each using dynamic SQL, to achieve:Process one:Create or replace procedure create_table asBeginExecute immediate ' CREATE TABLE emp (ID number,name varchar2 (Ten), salary number;) '; --Dynamic SQL for DDL statementsINSERT into EMP values (+, ' Jacky ', 5600);INSERT into EMP values (101, ' Rose ', 3000);INSERT INTO EMP values (102, ' John ', 4500);End create_table;Process two:Cr

Oracle queries and compiles data dictionaries, and oracle compiles dictionaries If you need to write a data dictionary during project delivery, you can use the following method to first run a line-by-line SQL statement. Select. TABLE_NAME AS table name,. COLUMN_NAME AS fiel

Oracle local management comparison data dictionary management tablespace, oracle dictionary Locally vs. Dictionary Managed Tablespaces Organized from: http://www.orafaq.com/node/3. When Oracleallocates space to a segment (like a table or index), a group of contiguousfree blocks, called an extent, is added to the segment. metadata regardingextent allocation and u

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Oracle uses AWR's SQL ordered by Gets and SQL ordered by Reads to diagnose problems I have read many database reports before, and have encountered two serious performance problems recently. They are very representative, so I recorded them. Once, the Oracle process is reported to get the CPU of the database server to 10

Oracle Performance Analysis 1: Enabling SQL tracking and obtaining trace files when Oracle queries encounter efficiency problems, we often need to understand the problem so as to provide solutions to the problem. Oracle provides the trace information for SQL Execution, inclu

Oracle SQL Language DDL and Object Management-beyond OCP proficient in Oracle Video tutorial training 27This course introduces:Oracle Video tutorial, wind Brother this set of Oracle Tutorial training is the Oracle SQL language DDL

triggersA. Enabling and disabling triggers: When to prohibit: Prohibit data import and exportsql> ALTER TRIGGER aiu_itemfile DISABLE;sql> ALTER TRIGGER aiu_itemfile ENABLE;B. recompiling a trigger: After a database object has changedC. Deleting a triggersql> DROP TRIGGER Aiu_itemfile;19. Triggers and stored proceduresTrigger Stored proceduresWrite no parameter, return value has parameter, return value (par

Tags: also sysdba DDR ext semantics not--data returnWe all know that every SQL statement in Oracle needs to be parsed before it executes, where it is divided into soft parsing and hard parsing. There are two types of SQL statements in Oracle, one for DDL statements (

, you only need to specify "nocycle" to perform any query operation. There is also a pseudo column related to this keyword -- connect_by_iscycle,If the content of a Father's Day point is referenced in the current row and a loop occurs in the tree, "1" is displayed in the pseudo column of the row; otherwise, "0" is displayed ". The start with .. connect by clause can be used to select data that has a hierarchical relationship(Usually some sort of paren

database as described below, and manually spread these changes to the slave database. Torename the datafile in the primary database, take the tablespace offline:1. Rename the data file in the master database and take the tablespace offline first:SQL> ALTER TABLESPACE tbs_4 OFFLINE; Exit from the SQL prompt and issue an operating system command, such as the following UNIXmvCommand, to rename the datafile

SQL optimization should be adjusted from five aspects:1. Remove unnecessary full table scans for large tables2. cache full table scan for small tables3. Verify the use of optimized Indexes4. Verify the optimized Connection Technology5. minimize the Cost of the Execution Plan SQL statement:Is the only way to operate databases (data;70% ~ 90% of database resources;

either succeed or fail B. Transaction Features: ACID: atomicity, consistency, isolation, and permanent persistence C. Transaction Control Process Start transaction The first SQL statement is automatically executed. Execute SQL Multiple SQL statements may be executed. Submit or roll back Commit or rollback D. the concept of a lock: A lock is a mechanism used by a