Refer to the following statement DROP TABLE IF EXISTS tb1_name; What does a statement based on this syntax do? It prevents a view being generated for a nonexistent table. It drops a table only if it does not contain a NULL value. It generates a warning about a nonexistent table. It prohibits a given table being dropped.
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.
Refer to the following statement
DROP TABLE IF EXISTS tb1_name;
What does a statement based on this syntax do?
- It prevents a view being generated for a nonexistent table.
- It drops a table only if it does not contain a NULL value.
- It generates a warning about a nonexistent table.
- It prohibits a given table being dropped.
SQL :
SQL definition Structured Query Language is what it stands for. Databases can be accessed and changed using SQL. In 1986, the American National Standards Institute (ANSI) recognized SQL as a standard, and in 1987, the International Organization for Standardization (ISO) did as well.
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