Which of the following is a correct statement?a. If you attempt to add a record that violates a constraint for one of the table’s columns, only the valid columns for the row are added.b. A subquery nested in the VALUES clause of an INSERT INTO command can return only one value without generating an Oracle 12c error message.c. If you attempt to add a record that violates a NOT NULL constraint, a blank space is inserted automatically in the appropriate column so that Oracle 12c can complete the DML operation.d. None of the above statements is correct.
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
Which of the following is a correct statement?
a. If you attempt to add a record that violates a constraint for one of the table’s columns, only the valid columns for the row are added.
b. A subquery nested in the VALUES clause of an INSERT INTO command can return only one value without generating an Oracle 12c error message.
c. If you attempt to add a record that violates a NOT NULL constraint, a blank space is inserted automatically in the appropriate column so that Oracle 12c can complete the DML operation.
d. None of the above statements is correct.
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