Discover how to use dblink in oracle sql, include the articles, news, trends, analysis and practical advice about how to use dblink in oracle sql on alibabacloud.com
The following articles mainly focus on the migration solution from Oracle SQL to DB2 SQL. Migration from Oracle SQL to DB2 SQL has become very popular, if you want to know more about its practical application, you can browse the f
Abstract: In the PLSQL development process, the use of SQL and PLSQL can meet most of the requirements, but in some special circumstances, using standard SQL statements or DML statements in PLSQL cannot meet your needs. for example, dynamic table creation or an uncertain operation must be performed dynamically. This requires dynamic
SQL> showparameter SQL NAME TYPE VALUE ----------------------------------------------------------------------------- Plsql_ccflags string Plsql_code_type string INTERPRETED Plsql_compiler_flags string INTERPRETED, NON_DEBUG Plsql_debug boolean FALSE Plsql_native_library_dir string Plsql_native_library_subdir_count integer 0 Plsql_optimize_level integer 2 Plsql_v2_compatibility boolean FALSE Plsql_warnings s
PL/SQL is an extension of Oracle's standard database language. Oracle has integrated PL/SQL into ORACLE servers and other tools, in recent years, more developers and DBAs have started to use PL/SQL. This article describes basic PL
Oracle sqlplus login. SQL settings, sqlpluslogin. SQL Sqlplus automatically runs two scripts at startup: glogin. SQL and login. SQL. The execution order is 1. The glogin. SQL file is searched for and executed in the $ ORACLE_HOME/
Tags: style blog http color using OS strong fileToad for Oracle installation package: Http://pan.baidu.com/s/1mgBOLZUAccessing database objects and writing SQL programs is a tedious and time-consuming task in the development of Oracle applications, and it takes a lot of SQL scripts to manage the database on a daily bas
ORACLE application optimization: Please avoid SQL processing in a large number of cyclic logic, oracle Optimization I encountered a case a while ago: a colleague said that a previously running package was suddenly much slower than before and the execution time was very long, in the evening, the job calls this package and does not run data for several hours. So I
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
the return value VAR salary number; exec:salary:=get_sal (7369); PRINT salary; Mode two: Call function directly in SQL statement SELECT get_sal (7369) from DUAL; way three: Use Dbms_output call function SET serveroutput on EXEC Dbms_output.put_line (' Wages are: ' | | get_sal (7369));Delete functions drop function get_sal; Create a PackageA package is a PL/
principle, the connection between tables must be written to the left of other where conditions , and those conditions that can filter out the maximum number of records must be written to the right of the WHERE clause .Example: Query employee's number, name, salary, department nameSelect Emp.empno,emp.ename,emp.sal,dept.dname from emp,dept where (Emp.deptno = Dept.deptno) and (Emp.sal > 1 500)Avoid using the * number in the SELECT clauseDuring the parsing process,
How to export data and tables from SQL Server and Oracle 1. Export and import data to a database in SQL Server1. Select the database to be transferred in the SQL Server Enterprise Manager, right-click and choose all tasks> back up the database.2. Select database for backup-complete,Target backup to press addEnter a cu
I. Description Oracle provides a profiler toolkit that allows you to view the performance of each module during PL/SQL Execution. You can download this script from MOS: Implementing andusing the PL/SQL profiler [ID 243755.1] You can also download it from my csdn: Http://download.csdn.net/detail/tianlesoftware/4051100 When there is asignificant gap between user
changes to accepted), you can also export the baseline plan from the staging table, and then use the exported baseline plan to load the SQL plan baseline into another database.Four Evolutionary SQL plan baselinesDuring the evolution phase of the SQL planning baseline, Oracle
. This resolution is called hard parsing; 5. You can query the SQL statements currently stored in the cache by querying v $ SQL. 6. When executing SQL statements, even statements that represent the same function are case-insensitive and have no comments, Oracle will be treated as different
time, network package size, and scheduling frequency.2. Adjust the optimizer statisticsStatistics of the optimizer should be collected and stored on a regular basis so that the optimizer generates the best execution plan based on the distribution of data. In addition, the histogram helps optimize the table join and for SkewedThe where clause predicate information makes the correct access decision.3. Adjust optimizer ParametersThe following optimizer parameters should be adjustedOptimizer_mode,
Idea: You can remotely query the table of an Oracle database by adding a linked server to the SQL Server databaseEnvironment preparation, install the SQL Server database, install the Oracle driver, configure the Oracle connection in the configured Tnsname file, I
not know how to use it effectively. The name and interpretation of all data dictionary tables. It has a synonym, dict.Dict_column field names and explanations in all data dictionary tables To query index-related data dictionaries, use the following SQL statement: SQL> select * From dictionary where instr (comment
I wrote a blog about Oracle Database remote connection: Oracle database -- server-side remote connection configuration. In that article, I recommended someone else's blog, which is the topic of this blog. However, I recently used it, so I went through my blog and found that the blog had been restricted for a long time. I found this on the Internet, so I decided to write it myself, for future
Http://cwbboy.cnblogs.com/archive/2006/03/22/356017.html You can access a database on the. net platform in the following ways:1. OleDB database access program,2. ODBC Database Access Program,3. proprietary database access programs. For example, when accessing SQL Server 2000, we generally like to use proprietary SQL Server. NET Framework database access programs
You can access a database on the. NET platform in the following ways: 1. oledb database access program, 2. ODBC Database Access Program, 3. proprietary database access programs. For example, when accessing SQL Server 2000, we generally like to use proprietary SQL Server. NET Framework database access programs. The namespace is system. Data. sqlclient. Here I
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