In relational table two row are identical is true or false?

In relational table two row are identical is true or false?
by

1 Answer

Answer :

False.
by
selected by

Related questions

Which of the following is true ? I. Implementation of self-join is possible in SQL with table alias. II. Outer-join operation is basic operation in relational algebra. III. Natural join and outer join operations are equivalent. (A) I and II are correct. (B) II and III are correct. (C) Only III is correct. (D) Only I is correct.

Description : Which of the following is true ? I. Implementation of self-join is possible in SQL with table alias. II. Outer-join operation is basic operation in relational algebra. III. Natural join and outer join operations are ... (B) II and III are correct. (C) Only III is correct. (D) Only I is correct.

Last Answer : (D) Only I is correct.

Is it true or false that a relational database typically consists of related two dimensional tables?

Description : Is it true or false that a relational database typically consists of related two dimensional tables?

Last Answer : Need answer

Like relational databases there does exists fuzzy relational databases. a) True b) False

Description : Like relational databases there does exists fuzzy relational databases. a) True b) False

Last Answer : a) True

<Condition>isa__ expression which will have value true or false. a. Relational b. Logical ce. Botha&b d. None of these

Description : isa__ expression which will have value true or false. a. Relational b. Logical ce. Botha&b d. None of these

Last Answer : ce. Botha&b

Like relational databases there does exists fuzzy relational databases. a) True b) False

Description : Like relational databases there does exists fuzzy relational databases. a) True b) False

Last Answer : a) True

a relational table must not contain a(n) ____. -General Knowledge

Description : a relational table must not contain a(n) ____. -General Knowledge

Last Answer : Relational table must not contain repeating groups.

In a relational database, this is a data structure that organizes the information about a single topic into rows and columns. 1) Block 2) Record 3) Tuple 4) Table 5) Command line interface

Description : In a relational database, this is a data structure that organizes the information about a single topic into rows and columns. 1) Block 2) Record 3) Tuple 4) Table 5) Command line interface

Last Answer : Answer :4

The “PROJECT” operator of a relational algebra creates a new table that has always (A) More columns than columns in original table (B) More rows than original table (C) Same number of rows as the original table (D) Same number of columns as the original table

Description : The “PROJECT” operator of a relational algebra creates a new table that has always (A) More columns than columns in original table (B) More rows than original table (C) Same number of rows as the original table (D) Same number of columns as the original table

Last Answer : (C) Same number of rows as the original table

If D1, D2,…. Dn are domains in a relational model, then the relation is a table, which is a subset of (A) D1+D2+…. +Dn (B) D1x D2x… xDn (C) D1U D2U….UDn (D) D1- D2-….-Dn

Description : If D1, D2,…. Dn are domains in a relational model, then the relation is a table, which is a subset of (A) D1+D2+…. +Dn (B) D1x D2x… xDn (C) D1U D2U….UDn (D) D1- D2-….-Dn

Last Answer : (B) D1x D2x… xDn

Consider the relations R(A,B) and S(B,C) and the following four relational algebra queries over R and S: I. πA,B(R⋈S) II. R⋈πB(S) III. R∩(πA(R) Χ πB(S)) IV. πA,R.B(R Χ S) where R.B refers to the column B in table R. One can determine that: (A) I, III and IV are the same query. (B) II, III and IV are the same query. (C) I, II and IV are the same query. (D) I, III and III are the same query.

Description : Consider the relations R(A,B) and S(B,C) and the following four relational algebra queries over R and S: I. πA,B(R⋈S) II. R⋈πB(S) III. R∩(πA(R) Χ πB(S)) IV. πA,R.B(R Χ S) where R.B refers to ... IV are the same query. (C) I, II and IV are the same query. (D) I, III and III are the same query.

Last Answer : (D) I, III and III are the same query.

In a relational database model, NULL values can be used for all but which one of the following? (A) To allow duplicate tuples in the table by filling the primary key column(s) with NULL. (B) To avoid confusion with actual legitimate data values like 0 (zero) for integer columns and ‘’ (the empty string) for string columns. (C) To leave columns in a tuple marked as “unknown” when the actual value is unknown. (D) To fill a column in a tuple when that column does not really “exist” for that particular tuple.

Description : In a relational database model, NULL values can be used for all but which one of the following? (A) To allow duplicate tuples in the table by filling the primary key column(s) with NULL. (B) To ... D) To fill a column in a tuple when that column does not really exist for that particular tuple.

Last Answer : (A) To allow duplicate tuples in the table by filling the primary key column(s) with NULL.

Which of the following statements concerning Object-Oriented databases is FALSE? (A) Objects in an object-oriented database contain not only data but also methods for processing the data. (B) Object-oriented databases store computational instructions in the same place as the data. (C) Object-oriented databases are more adapt at handling structures (analytical) data than relational databases. (D) Object-oriented databases store more types of data than relational databases and access that data faster.

Description : Which of the following statements concerning Object-Oriented databases is FALSE? (A) Objects in an object-oriented database contain not only data but also methods for processing the data. (B ... Object-oriented databases store more types of data than relational databases and access that data faster.

Last Answer : (C) Object-oriented databases are more adapt at handling structures (analytical) data than relational databases.

Use the ADD_GROUP_ROW procedure to add a row to a static record group? I) TRUE II)FALSE

Description : Use the ADD_GROUP_ROW procedure to add a row to a static record group? I) TRUE II)FALSE

Last Answer : I) FALSE

Use the Add_group_row procedure to add a row to a static record group 1. true or false?

Description : Use the Add_group_row procedure to add a row to a static record group 1. true or false?

Last Answer : False

Assertion (A): The coin when flipped next time will come up tails. Reason (R): Because the coin was flipped five times in a row, and each time it came up heads. Choose the correct answer from below: (A) Both (A) and (R) are true, and (R) is the correct explanation of (A). (B) Both (A) and (R) are false, and (R) is the correct explanation of (A). (C) (A) is doubtful, (R) is true, and (R) is not the correct explanation of (A). (D) (A) is doubtful, (R) is false, and (R) is the correct explanation of (A).

Description : Assertion (A): The coin when flipped next time will come up tails. Reason (R): Because the coin was flipped five times in a row, and each time it came up heads. Choose the correct answer from below: (A) Both (A ... A). (D) (A) is doubtful, (R) is false, and (R) is the correct explanation of (A).

Last Answer : (C) (A) is doubtful, (R) is true, and (R) is not the correct explanation of (A).

With regard to the expressive power of the formal relational Query languages, which of the following statements is TRUE?

Description : With regard to the expressive power of the formal relational Query languages, which of the following statements is TRUE?  A) relational algebra is more powerful than relational calculus B) relational ... calculus C) relational algebra has the same power as safe relational calculus D) None of these

Last Answer : relational algebra has the same power as safe relational calculus

A tuple is 1) - 1) Column of a Table 2) Two dimensional Table 3) Row of a Table 4) key of a Table

Description : A tuple is 1) - 1) Column of a Table 2) Two dimensional Table 3) Row of a Table 4) key of a Table

Last Answer : 3) Row of a Table

Write down the steps to insert a new row into the table. -Technology

Description : Write down the steps to insert a new row into the table. -Technology

Last Answer : Insert a RecordSteps to insert a record in a Datasheet View are as follows:Step 1 When you create a table, a new blank record automatically appears in the second row of the table or If you enter ... into the fields.Step 3 When you have finished adding records in the datasheet, save it and close it.

Which of the following is used to specify the beginning of a table’s row? (a) <table> -Technology

Description : Which of the following is used to specify the beginning of a table’s row? (a) -Technology

Last Answer : (b) tag indicates the beginning of a table’s row.

The rowspan attribute with < table > tag is used to merge more than one cells row wise. -Technology

Description : The rowspan attribute with < table > tag is used to merge more than one cells row wise. -Technology

Last Answer : True The rowspan attribute merges the cells row wise in a table.

Table row <tr> tag can accept one attribute. -Technology

Description : Table row tag can accept one attribute. -Technology

Last Answer : False The tag can accept many attributes.

Write the introduction of row and column of table ?

Description : Write the introduction of row and column of table ?

Last Answer : Tables are created to store any information in a special way. The horizontal position in the table is called row and the vertical position is called column .

How would you determine who has added a row to a table?

Description : How would you determine who has added a row to a table?

Last Answer : Turn on fine grain auditing for the table.

What is the fastest way of accessing a row in a table ?

Description : What is the fastest way of accessing a row in a table ?

Last Answer : Using ROWID.CONSTRAINTS

What is the minimum number of rows and columns that a word table can have a) 1 row & 1 columnb) 2 rows & 2 columnsc) Zerod)1 row & 2 columnse) None of The Above

Description : What is the minimum number of rows and columns that a word table can have a) 1 row & 1 column b) 2 rows & 2 columns c) Zero d)1 row & 2 columns e) None of The Above

Last Answer : a) 1 row & 1 column

The minimum number of rows and columns that a word table can have, is: a) Zero b) 1 Row and 1 Column c) 1 Row and 2 Columnsd) None of The Above

Description : The minimum number of rows and columns that a word table can have, is: a) Zero b) 1 Row and 1 Column c) 1 Row and 2 Columns d) None of The Above

Last Answer : b) 1 Row and 1 Column

The row rangefor a table is dynamically partitioned and each row range is called a) Tablet b) Row key c) Time stamp d) Pairs

Description : The row rangefor a table is dynamically partitioned and each row range is called a) Tablet b) Row key c) Time stamp d) Pairs

Last Answer : Tablet

The row rangefor a table is dynamically partitioned and each row range is called a) Tablet b) Row key c) Time stamp d) Pairs

Description : The row rangefor a table is dynamically partitioned and each row range is called a) Tablet b) Row key c) Time stamp d) Pairs

Last Answer : Tablet

Maximization problem, then convert into minimization table through _________ a. Row minimization b. Column minimization c. Regret matrix d. Profit matrix

Description : Maximization problem, then convert into minimization table through _________ a. Row minimization b. Column minimization c. Regret matrix d. Profit matrix

Last Answer : c. Regret matrix

................................is that element of the simplex table which lis both in the key row and key column. a. Key element b. Pivot element c. Both a and b d. None of these

Description : ................................is that element of the simplex table which lis both in the key row and key column. a. Key element b. Pivot element c. Both a and b d. None of these

Last Answer : c. Both a and b

Any column or row of a simplex table is known as ......................... a. Key column b. Key row c. Vector d. None of these

Description : Any column or row of a simplex table is known as ......................... a. Key column b. Key row c. Vector d. None of these

Last Answer : c. Vector

In the periodic table, which term identifies a horizontal row?

Description : In the periodic table, which term identifies a horizontal row?

Last Answer : ANSWER: PERIOD

In the periodic table, which of the following identifies a horizontal row? w) period x) group y) family z) series

Description : In the periodic table, which of the following identifies a horizontal row? w) period x) group y) family z) series

Last Answer : ANSWER: W -- PERIOD

In a table to move to the first cell in a row, ____ is the keyboard shortcut key.

Description :  In a table to move to the first cell in a row, ____ is the keyboard shortcut key.  a) Alt+Tab b) Alt+Shift c) Alt+Ctrl d) Alt+Home

Last Answer :  In a table to move to the first cell in a row, Alt+Home is the keyboard shortcut key.

A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be a.2.5 m/s b.zero c.5 m/s d.10 m/s e.107 dynes

Description : A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be a.2.5 m/s b.zero c.5 m/s d.10 m/s e.107 dynes

Last Answer : c. 5 m/s

A, B, C and D are to be seated in a row. C and D cannot be on adjacent seat. Also, B cannot be at the third place. Which of the following must be false? (1) A is at the fourth place (2) A is at the third place (3) A is at the second pla

Description : A, B, C and D are to be seated in a row. C and D cannot be on adjacent seat. Also, B cannot be at the third place. Which of the following must be false? (1) A is at the fourth place (2) A is at the third place (3) A is at the second pla

Last Answer : (4) A is at the first place

The zeroth law of thermodynamics pertains to what relational condition that may exist between two systems?

Description : The zeroth law of thermodynamics pertains to what relational condition that may exist between two systems?

Last Answer : Thermal equilibrium

The relational model is based on the concept that data is organized and stored in two-dimensional tables called ………………………A) Fields B) Records C) Relations D) Keys

Description : The relational model is based on the concept that data is organized and stored in two-dimensional tables called ………………………A) Fields B) Records C) Relations D) Keys

Last Answer : C) Relations

Let E1 and E2 be two entities in E-R diagram with simple single valued attributes. R1 and R2 are two relationships between E1 and E2 where R1 is one-many and R2 is many-many. R1 and R2 do not have any attributes of their own. How many minimum number of tables are required to represent this situation in the Relational Model? (A) 4 (B) 3 (C) 2 (D) 1

Description : Let E1 and E2 be two entities in E-R diagram with simple single valued attributes. R1 and R2 are two relationships between E1 and E2 where R1 is one-many and R2 is many-many. R1 and R2 do not have any ... are required to represent this situation in the Relational Model? (A) 4 (B) 3 (C) 2 (D) 1

Last Answer : (B) 3 

Let M and N be two entities in an E-R diagram with simple single vale attributes. R1 and R2 are two relationship between M and N, whereas R1 is one-to-many and R2 is many-to-many. The minimum number of tables required to represent M, N, R1 and R2 in the relational model are .......... (1) 4 (2) 6 (3) 7 (4) 3

Description : Let M and N be two entities in an E-R diagram with simple single vale attributes. R1 and R2 are two relationship between M and N, whereas R1 is one-to-many and R2 is many-to-many. The minimum number of tables required to ... and R2 in the relational model are .......... (1) 4 (2) 6 (3) 7 (4) 3

Last Answer : Answer: 4

RDBMS provides relational operators to manipulate the data. Here, RDBMS refers to (a) Record Database Management System -Technology

Description : RDBMS provides relational operators to manipulate the data. Here, RDBMS refers to (a) Record Database Management System -Technology

Last Answer : (b) RDBMS stands for Relational Database Management System, which provides the operator to manipulate the data stored in the database table.

How are relationship between tables expressed in a relational database?

Description : How are relationship between tables expressed in a relational database?

Last Answer : Tables are the basic building blocks of a relationaldatabase.

What is Relational Database Management System ?

Description : What is Relational Database Management System ?

Last Answer : Database databases are organized in different rows, that is, files are considered only in records, but also in tables with list rows and columns. This type of database is called relational database management system.

How does relational-centred planning differ from traditional models of case planning please help im working as a cyc worker for child and youth care and need help?

Description : How does relational-centred planning differ from traditional models of case planning please help im working as a cyc worker for child and youth care and need help?

Last Answer : Need answer

Effective therapy is an ongoing process of building relational bridges that engender __________ and confidence.?

Description : Effective therapy is an ongoing process of building relational bridges that engender __________ and confidence.?

Last Answer : Cultural sensitivity

What is special about the declaration of relational operators?

Description : What is special about the declaration of relational operators?

Last Answer : Relational operators must be declared in pairs. 

Which method can’t be used for expressing relational knowledge? a) Literal system b) Variable-based system c) Attribute-based system d) None of the mentioned

Description : Which method can’t be used for expressing relational knowledge? a) Literal system b) Variable-based system c) Attribute-based system d) None of the mentioned

Last Answer : c) Attribute-based system

____________ are algorithms that learn from their more complex environments (hence eco) to generalize, approximate and simplify solution logic. a) Fuzzy Relational DB b) Ecorithms c) Fuzzy Set d) None of the mentioned

Description : ____________ are algorithms that learn from their more complex environments (hence eco) to generalize, approximate and simplify solution logic. a) Fuzzy Relational DB b) Ecorithms c) Fuzzy Set d) None of the mentioned

Last Answer : c) Fuzzy Set