Which of the following are valid Explain operators? (Choose two.)
Which of the following are valid Explain operators? (Choose two.)
Among the options listed, IXSCAN and COLSCAN are valid Explain operators. IXSCAN refers to the scanning of an index, which is a common operation in database query plans to quickly locate rows based on indexed column values. COLSCAN refers to a collection scan, where the database system scans through all records or a subset of records in a collection or table to find relevant data. These operators are essential in understanding and optimizing query performance in database systems.
B and C correct IXSCAN This operator represents the scanning of an index. XSCAN operator This operator is used to navigate XML fragments to evaluate XPath expressions and to extract document fragments if needed. https://www.ibm.com/docs/en/db2/11.1?topic=tool-operators
B and C correct https://www.ibm.com/docs/en/db2/11.1?topic=tool-operators
B&C XSCAN operator This operator is used to navigate XML fragments to evaluate XPath expressions and to extract document fragments if needed. IXSCAN This operator represents the scanning of an index.
The correct answer is A and B. C is wrong. https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.admin.explain.doc/doc/r0021330.html
Updated reference : https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.admin.explain.doc/doc/r0052023.html