These rows are called Active Set. Decision-making and looping are not allowed in SQL. All SQL statements are executed at a time by the database server which is why it becomes a time-consuming process. There is no error handling mechanism in SQL. This supports an error handling mechanism. It is useful during the declaration of a variable that has the same data type as that of its table column.
The row of a table is called a record and its fields would have the same data types and names as the columns defined in the table. The functions that are used for manipulating the character data are called String Functions. LEFT: This function returns the specified number of characters from the left part of a string. The table columns are referred to as THEN.
Only the NOW. Only the THEN. The cursors that are declared in the procedures will have the local scope and hence they cannot be used by other procedures. The cursors that are declared in package specifications are treated with global scope and hence they can be used and accessed by other procedures. COMMIT transaction action does saving of all the outstanding changes since the last commit and the below steps take place: The release of affected rows.
The transaction is marked as complete. The details of the transaction would be stored in the data dictionary. A table that is being modified by the usage of the DML statement currently is known as a mutating table. It can also be a table that has triggers defined on it. A table used for reading for the purpose of referential integrity constraint is called a constraining table. Number 9, 12 indicates that there are 12 digits after decimal point. But since the maximum precision is 9, the rest are 0 padded like 0.
Number 9, indicates there are 21 digits before the decimal point and out of that there are 9 possible digits and the rest are 0 padded like Finally, it gives more power over the database to the programmers due to the feature of decision making, filtering, and looping abilities thereby making it a more convenient and reliable means for the programmers to work on it.
Maximum of how many triggers is possible to apply on one table? Sometimes yes depending on the condition. Which among the below options defines a cursor correctly? A cursor A cursor A cursor. If you are a fresher and you want to learn about SQL, or if you are a teacher and you want to spread SQL knowledge, this book is very helpful.
Author : Neelan Q. This is the best career investment you can make for a reasonable price. This book is an indispensable resource for Microsoft. Net Developers. MAX D. Select incorrect variable declarations A. Select invalid variable types A. CHAR B. List the correct sequence of commands to process a set of records when using explicit cursors A. None of the above ANS: B None of the above ANS: D Incantination B. Integration C. Continuation D.
Concatenation E. Which of the following is not an Oracle DML function? NVL E. None of the above. All are valid. ANS: C.
Select the best answer. Which listed attribute is an invalid attribute of an Explicit cursor. All of these are valid. ANS: E Which of the following is not a grouping function. SUM C. MIN E. All of the above. ANS: C These are all valid. ANS: B What command can you use to see the errors from a recently created view or stored procedure?
ANS: D Select the best answer below. What are the components of a package? Box, wrapping and binding B. Header and body C. Specification and content D. Specification and body E. True or False? True b. False ANS: A Subprograms and anonymous blocks can be called by other applications.
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