除非您指定-help選項,否則必須指定 package-options 或 dynamic-options。 您可以使用單一呼叫db2expln來說明套件及動態 SQL。 先前列出的部分選項旗標對您的作業系統可能有特殊意義,因此在db2expln指令行中可能無法正確解譯。 不過,您可以在這些字元之前加上作業系統跳出字元,以輸入這些字元。 如需相關資訊,請參閱...
the MySQL optimizer considers many techniques to efficiently performthe lookups involved in an SQL query. A query on a huge table can be performedwithout reading all the rows; a join involving several tables can be performedwithout comparing every combination of rows. The set of operations...
The execution plan shows that DBMS parses the SQL commands.The 1st step is executing SELECT STATEMENT and the 2nd step is access EMP table using ‘FULL TABLE SCAN’. The statistics shows that historical statistics information of destinate data.It implies that method of getting physical data.For ...
the MySQL optimizer considers many techniques to efficiently performthe lookups involved in an SQL query. A query on a huge table can be performedwithout reading all the rows; a join involving several tables can be performedwithout comparing every combination of rows. The set of operations...
A user with theVIEWACTIVITYsystem privilegecan generate a bundle for any statement. To grant this privilege, issue the following SQL commands. Replace{user}with the user's ID. ALTERUSER{user}WITHVIEWACTIVITY;GRANTSYSTEMVIEWSYSTEMTABLETO{user}; ...
root@127.0.0.1:26257/movr> \h EXPLAIN Command: EXPLAIN Description: show the logical plan of a query Category: miscellaneous Syntax: EXPLAIN <statement> EXPLAIN ([PLAN ,] <planoptions...> ) <statement> EXPLAIN (DISTSQL) <statement> EXPLAIN ANALYZE [(DISTSQL)] <statement> EXPLAIN ANALYZE (...
The Run SQL Scripts function, a.k.a. the SQL Script Center or Script Center, allows the user to execute all or a subset of a script that contains one or more SQL statements and/or batch CL commands. It is part of the Navigator Database function and is an extremely powerful and flexib...
For example, run the commands inExample 9-2from a SQL*Plus session to create thePLAN_TABLEin theHRschema. Example 9-2 Creating a PLAN_TABLE CONNECT HR/your_password@$ORACLE_HOME/RDBMS/ADMIN/UTLXPLAN.SQLTable created. Oracle Corporation recommends that you drop and rebuild thePLAN_TABLEtable...
SQL*Plus Oracle SQL*Plus Locating Oracle Home Shared Server Executable Starting Shared Server Shared Server Commands Disconnect Command Potential Mistake-commands Shared Server Help Describe Command Spool Command Execute SQL Shared Server Conclusion Database Architecture Database File Types Initialization File...
Our main goal is to share tips from some well-known bughunters. Using recon methodology, we are able to find subdomains, apis, and tokens that are already exploitable, so we can report them. We wish to influence Onelinetips and explain the commands, for