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you need to have one table that stores personal details, lets say TableA Another table that stores Test results, lets say TableB Another table that stores Medicines, lets Say TableC And one common key that joins these tables, meaning implementing one to many relation ship, by creating foreign key constraints on tables. On the same DB I m running another insert query using Union all to insert data in 11 columns this is taking 1 sec for 1000 records but other query which is inserting data in 20 columns taking 5 sec
2c) Using an inline view is also identical, 4 rows updated, but this needs a primary or unique constraint to be in place on the table which is not being updated. Re-testing should be done after a major upgrade, because Oracle continually improve the optimizer, and your hint may eventually prevent improvements from taking effect
One problem with this approach, however, is that your program, although incomplete, might still compile, giving you or someone else a mistaken impression of the state of that code. In order to disable conditional compilation in Oracle Database 10g Release 1 or enable it in Oracle9i Database, contact Oracle Support for information on the conditional compilation underscore parameter
Over a period of time, we have seen the language evolve into a comprehensive development platform by virtue of more and more functionality that requires less coding. You wish you could have created the trigger earlier, but when you create a trigger, it's enabled, which is not something you can do outside the change window
SQL FAQ - Oracle FAQ
COMMIT - save work done SAVEPOINT - identify a point in a transaction to which you can later roll back ROLLBACK - undo the modification I made since the last COMMIT SET TRANSACTION - Change transaction options like isolation level and what rollback segment to use SET ROLE - set the current active roles DML are not auto-commit. If you include the SAMPLE clause within a multi-table or remote query, you will get a parse error or "ORA-30561: SAMPLE option not allowed in statement with multiple table references"
CONTINUE Statement The CONTINUE statement exits the current iteration of a loop unconditionally and transfers control to the next iteration of either the current loop or an enclosing labeled loop. (For complete syntax, see "IF Statement".) In Example 4-1, the statements between THEN and END IF run if and only if the value of sales is greater than quota+200
If, when you exit the inner loop early, you also want to exit the outer loop, then label the outer loop and specify its name in the EXIT WHEN statement, as in Example 4-25. (For complete syntax, see "IF Statement".) In Example 4-1, the statements between THEN and END IF run if and only if the value of sales is greater than quota+200
4.1.2 Use the IF-THEN-ELSE Statement In this exercise, you use the IF-THEN-ELSE statement to check how many students are enrolled in course number 25, section 1. Execute the script, and then answer the following questions: What output is printed on the screen (for both dates)? ANSWER: The first output produced for the date is 09-JAN-2008
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