The database is a way to store the data in tabular form. The database is a collection of the tables and all the tables are connected with the keys. The keys are the column their respective data has uniquely differentiated the rows. The main types of keys are the primary key, foreign ...
The SQL uses some operators to throw queries like SELECT uses to selects a data value and shown on the output screen, Where uses for conditions, Group by uses to group the output, Joins uses to join the two or more tables with the ...
A plan table name if you are using a table different than PLAN_TABLE A statement ID if you have set a statement ID with the EXPLAIN PLAN A format option that determines the level of detail: BASIC, SERIAL, and TYPICAL, ALL, Some examples of the use of DBMS_XPLAN to display PLAN_TA...
If you don't name the query blocks in a statement, Oracle will generate query block names for you. To see those names automatically, run an EXPLAIN PLAN on your statement followed by a query using the ALL option of DBMS_XPLAN.DISPLAY: SELECT PLAN_TABLE_OUTPUT FROM TABLE(DBMS_XPLAN.DISPLAY...
A database table must have a primary key and may also have foreign keys. When a database is normalized the data will appear only once in one table and will not be duplicated in another table.Answer and Explanation: Become a member and unlock all...