Only unmatched data is returned. This type of join is mostly used for queries with the NOT EXISTS clause. Hash Semi Join Rows are returned if a data record is matched. The returned rows do not contain duplicate data. This type of join is usually used for queries with the EXISTS clause...
* objtype is the type of the group object, labelname is its label within * a containing object (if any). * * If labeled is true, the group members will be labeled properties, * while if it's false, they'll be unlabeled objects. */voidExplainOpenGroup(const char *objtype, const ...
In older MySQL releases, partition information was produced usingEXPLAIN PARTITIONS. That syntax is still recognized for backward compatibility but partition output is now enabled by default, so thePARTITIONSkeyword is superfluous and deprecated. Its use results in a warning, and it is removed fromEXP...
2010-01-26 15:39:50: (critical) proxy-plugin.c.288: got asked to send a resultset, but ignoring it as we already have sent 1 resultset(s). injection-id: 3 This seems to suggest that an explain is trying to be performed on a data structure that no longer exists. The second line...
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1章练习题 Fill in the blanks. In the past century, language teaching and learning practice have been influenced by three different views of language: the view, the view and the view. 【答案】structural,functional,interactional 【解析】上世纪语言教学和语言学习受三种语言观的影响:结构主义,功能主义...
Figure 28: Concept of parallel execution in the Oracle database The QC is easily identified in the parallel execution plan as it writes its name in the plan. You can see this on the line with ID#1 of the plan shown in Figure where you see the operation 'PX COORDINATOR'. All of the...
Discuss how the development of the Internet has changed the market structure in which companies operate. Explain efficient market hypothesis and its three forms. Explain at least five tools available for government intervention to deal with market failure with suitable examples. ...
What is a record set ? What are its type ? Explain Data Abstraction in C++ Explain Various Type Object-Oriented Languages. Advantages and Applications of OOP Next → ← Prev Like/Subscribe us for latest updates About Dinesh Thakur Dinesh Thakur holds an B.C.A, MCDBA, MCSD certifications. Di...
Variable: A variable is used for storing a value either a number or a character and a variable also vary its value means it may change his value Variables are used for given names to locations in the Memory of Computer where the different constants are stored....