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the associated data will make 10 requests to the database (in fact, these 10 requests are very fast first is the database connection pool The second is the above SQL execution mechanism is directly run will not perform hard parsing because these 10 SQL is consistent)8. Avoid using SELECT * * will cause Oracle to parse which columns in this table are not directly taken. * will result in data transfer the best need what to take whatSummary: The above o

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Rest a day, finally can catch breath, usually teacher teach very good but progress also pretty fast, a wandering almost can't keep up with, so Sunday rest basically also can only use to sleep 23333 ....This week, I told you something new, a Web-console command, and I learned how to read the form,Reference graph:Here are some ways to share the practice (Secret welfare Oh ~ ~) It takes time to digest .....Participate in the fifth day of training for the

Tags: exam mysq third day inf rom jpg alt src imgThis time I'm going to write it down! November 4, the first exam, the content of the exam is about the MySQL query command, the test of a morning, took the question to a face, not kidding, I thought the problem will be very simple! The result is I think too much .... Give some examples: Identify all people with the same native origin as "Qin Yi" (Qin Yi: MMP) SELECT * from Stu where jg= (select JG from Stu where name= "Qin Yi"); Find out the dep

commit" is modified to "one line". 14, P112 "Maxvle" modified to "Maxvale". 15, P125 in the last paragraph after the execution of "commit;". 16, P127 in the last paragraph of the plsql, the "999" before the space is removed. 17, P129 will "if the client takes a shared server connection, the directory where the trace files are stored is changed to" private "by" sharing "in the parameter User_dump_dest decision. 18, P150 in the top code, the "Time_num" before the space is removed. 19, P152 the se

)=UPPER('name'); + - $ Declare $V_namevarchar2( -); -V_sal Number(7,2); - begin the SelectEname,sal intoV_name,v_sal fromEmpwhereEmpno=No; -Dbms_output.put_line (v_name||','||v_sal);Wuyi Exception the whenNo_data_found Then -Dbms_output.put_line ('Sorry, the user you entered does not exist'); Wu End; - About ---%type: Use data type of a column in a database as the data type of a variable $syntax; table name. Column Name%type - - Declare -V_name Emp.ename%type; AV_sal Emp.sal%type; +

This is my colleague to the company to do internal training ppt of the handout, for everyone to share. This is the training outline, PPT in Find place to upload, and so found will send the link here. Put it on the csdn for the time being, earn points download points: download.csdn.net/download/kingstarer/10655069 Cut a few ppt page you can preview it first Hello, everyone, welcome to participate in tod

Oracle Advanced Training Course 1st learning notes revised the page number in this course notes corresponds to Oracle9i Database Management Basics II ed 1.1 vol.1.pdf Guide: http://blog.csdn.net/magus_yang/archive/2006/10/10/1328283.aspx Author: jackyang (JackYang.sh@gmail.com) Time: 2006-10-10 p151 restore (Restore) and recovery (recovery) Difference: Restore, just copy back the backup file back. Recovery

Tags: java SP data linux BS Management database SQL applicationOracle Database Expert Combat training courseRecommend a set of 0 Basics video Tutorials to start learning Oracle database expert Combat trainingThe course covers four versions of ORACLE9I/10G/11G/12C.The course is 0 basics, starting with the most basic Linux environments, Oracle installation configur

Oracle Database Expert Combat training courseRecommend a set of 0 Basics video Tutorials to start learning Oracle database expert Combat trainingThe course covers four versions of ORACLE9I/10G/11G/12C.The course is 0 basics, starting with the most basic Linux environments, Oracle installation configuration, and basic S

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Oracle database Cluster disaster tolerance implementation and maintenance (Rac+dataguard+goldengate) Training TutorialsPackage Description:Wind Brother Oracle Database Cluster disaster Recovery (rac+dataguard+goldengate) Implementation and Maintenance training course package) includes content:ORACLE12C Dataguard Disast

For the technical content of Oracle databases that DBAs need to master, the training content developed will involve the following content. 1. Oracle Installation and upgrade (including hardware, network and database planning and design before installation) 2. Oracle memory components and process Components Iii.