Because Characters, Numeric, and Float are all valid SQL types.
Which is not valid SQL type?
Explanation: DECIMAL is not a valid SQL type because it is nothing but numeric only in SQL. NUMERIC has fixed precision, and scale numbers range from -10^38+1 to 10^38-1. FLOAT has floating precision number ranges from -1.79E + 308 to 1.79E + 308.
Which of the following is valid SQL statement?
The correct answer to the question “Which of the following is a valid SQL command” is option (d). … As all these Character, Numeric, and Float are valid SQL commands.
Which of the following is a type of SQL?
The lists in the following sections provide a functional summary of SQL statements and are divided into these categories: Data Definition Language (DDL) Statements. Data Manipulation Language (DML) Statements. Transaction Control Statements.
What are the DML commands?
Some commands of DML are:
- SELECT – retrieve data from the a database.
- INSERT – insert data into a table.
- UPDATE – updates existing data within a table.
- DELETE – deletes all records from a table, the space for the records remain.
- MERGE – UPSERT operation (insert or update)
- CALL – call a PL/SQL or Java subprogram.
Which is valid for index?
|Que.||Which of the following is valid SQL for an Index?|
|b.||CHANGE INDEX ID;|
|c.||ADD INDEX ID;|
|d.||REMOVE INDEX ID;|
|Answer:CREATE INDEX ID;|
Why as clause is used in SQL?
SQL AS keyword is used to give an alias to table or column names in the queries. In this way, we can increase the readability and understandability of the query and column headings in the result set.
What is difference between SQL and MySQL?
SQL is a query language, whereas MySQL is a relational database that uses SQL to query a database. You can use SQL to access, update, and manipulate the data stored in a database. … SQL is used for writing queries for databases, MySQL facilitates data storing, modifying, and management in a tabular format.
Is SQL a DML?
A DML is often a sublanguage of a broader database language such as SQL, with the DML comprising some of the operators in the language. … A popular data manipulation language is that of Structured Query Language (SQL), which is used to retrieve and manipulate data in a relational database.
What is triggers and types of triggers?
A trigger defines a set of actions that are performed in response to an insert, update, or delete operation on a specified table. When such an SQL operation is executed, the trigger is said to have been activated. Triggers are optional and are defined using the CREATE TRIGGER statement.