Informatics Practices
Assertion. The INSERT INTO statement can skip some columns' values.
Reason. Only the columns allowing the NULL values or have default-value-defined, can be skipped in INSERT INTO statement of SQL.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
SQL Queries
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation
The INSERT INTO statement allows skipping columns values for columns that permit NULL values or have default values defined. If any other column (that does not have a default value and is defined as NOT NULL) is skipped or omitted, an error message is generated, and the row is not added.
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Related Questions
Assertion. The UNIQUE and PRIMARY KEY constraints are similar but not the same.
Reason. There can be only one column with PRIMARY KEY constraint, in a table.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion. In terms of values allowed in a column, both UNIQUE and PRIMARY KEY constraints are not the same.
Reason. UNIQUE allows NULL value once in the column, but PRIMARY KEY does not.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion. The PRIMARY KEY can be defined only once in the CREATE TABLE command.
Reason. If the PRIMARY KEY is a composite key, then it is not defined with the individual columns but at the end of the table definition as a table constraint.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion. INSERT, UPDATE, DELETE, SELECT are the DML commands.
Reason. The DML commands manipulate the data stored in the database tables.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.