Top 8 what is the function of the unique constraint unique कांसट्रेंट का कार्य क्या है 2022

विवरण: Confused About the Answer? Ask for Details Here. Know Explanation? Add it Here Discussion Forum. Que.. What is the function of the unique constraint?. a.. It ensures that no two values under an attribute are identical. b.. It ensures that all the attributes are perfectly unique in their data type. c.. It e

विवरण: asked . Jul 21, 2021 in RDBMS by (117k points)What is the function of the unique constraint? (a) It ensures that no two values under an. attribute are identical (b) It ensures that all the attributes are perfectly unique in their data type (c) It ensures that all the relations in the databas

विवरण: . asked Feb 20 in Programming by . DivyansheeSahoo (29.9k points) closed Feb 21 by. DivyansheeSahooWhat is the function of the unique constraint? (a) It ensures that no two values under an attribute are identical (b) It ensures that all the attributes are perfectly unique in their data typ

विवरण: This set of RDBMS Multiple Choice Questions & Answers (MCQs) focuses on “Integrity Constraints”.1. Which of the following is not an integrity constraint? a) not null b) unique c) identical d) check View AnswerAnswer: c Explanation: Identical is not an. allowed integrity constraint in SQL. Not nul

विवरण: Trying to Violate a Unique Constraint. When to Use a Unique Constraint (with Examples). Defining a UNIQUE Constraint. A Multicolumn Unique. Constraint. SQL’s Useful UNIQUE Constraint. Why Use a Unique Constraint?. Example 1: Unique Values. Example 2: Row Identification. Adding to an Existing Table. Remove a UNIQUE Constraint.

विवरण: Question 1 - Case Based MCQ questions - Chapter 8 - Database Concepts. Consider the following SQL command: CREATE TABLE MEMBER (MEM_ID INTEGER NOT NULL, NAME CHAR(15) NOT NULL, DATE_JOIN DATE, SEX CHAR(1) CHECK (SEX= ‘M’ OR SEX = ‘F’), ADDRESS VARCHAR(100) NOT NULL, PH_NO CHAR(15), PRIMARY KEY (MEM_NO), INDEX MEM_IDX (DATE_JOIN) ); . Now answer the following questions: . NOT NULL ensures that (A) Column cannot have blank value . (B) Column will not accept any value . (C) Column has a fixed value . (D) Column has a unique value . By default format of date entered is . The ______ constraint ensures that the value entered specifies a certain condition PRIMAY KEY in above example ensures that . (A) MEM_ID is entered primarily . (B) MEM_ID will hold a uniquely identified value . (C) MEM_ID will not remain blank . The INDEX command in above example will . (A) Create an index on field DATE_JOIN . (B) Create an index namely MEM_IDX . (C) Both (a) and (b) . (D) None of the above .

विवरण: Unique constraints ensure that the data in a column or combination of columns is unique for each row. A table's primary key, for example, functions as an implicit unique constraint. In EJB persistence, you represent other unique constraints with an array of . UniqueConstraint annotations within th

विवरण: Syntax for UNIQUE constraint in SQL. Example for UNIQUE constraint(Column Level) in SQL. Example for UNIQUE constraint(Table Level) in SQL. Example for ADD UNIQUE constraint(Column Level) with ALTER TABLE Statement in SQL. Example. for ADD UNIQUE constraint(Table Level) with ALTER TABLE Statement in SQL. Example for DROP UNIQUE constraint with ALTER TABLE Statement in SQL.