Suppose relation R (x, y, z, w) has no tuples. Consider the trigger: CREATE TRIGGER T AFTER INSERT ON R REFERENCING NEW ROW AS newRow FOR EACH ROw WHEN ((newRow.x * newRow.y) > 22) INSERT INTOR VALUES(newRow.x + newRow.w, newRow.y - newRow.z, newRow.z + 1, newRow.w-1); How many tuples will be in relation R after inserting tuple (5, 9, 2, 5) into the relation?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Suppose relation R (x, y, z, w) has no tuples. Consider the trigger:
CREATE TRIGGER T
AFTER INSERT ON R
REFERENCING NEW ROW AS newRow
FOR EACH ROw
WHEN ((newRow.x * newRow.y) > 22)
INSERT INTO R VALUES(newRow.x + newRow.w,
newRow.y - newRow.z,
newRow.z + 1, newRow.w-1);
How many tuples will be in relation R after inserting tuple (5, 9, 2, 5) into the relation?
Answer:
Transcribed Image Text:24 of 40 Suppose relation R (x, y, z, w) has no tuples. Consider the trigger: CREATE TRIGGER T AFTER INSERT ON R REFERENCING NEW ROW AS newRow FOR EACH ROw WHEN ((newRow.x * newRow.y) > 22) INSERT INTO R VALUES(newRow.x + newRow.w, newRow.y - newRow.z, newRow.z + 1, newRow.w-1); How many tuples will be in relation R after inserting tuple (5, 9, 2, 5) into the relation? Answer:
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