LeetCode 2408: Design SQL
LeetCode 2408 Solution Explanation
Explanation
To design a SQL system, we need to consider the basic components such as tables, columns, data types, constraints, and queries. We will create a simple SQL database system that allows for table creation, insertion of data, querying, and dropping tables.
Algorithmic Idea
- Define a class
Tablethat represents a table with columns and data. - Define a class
Columnthat represents a column with a name and data type. - Implement methods in the
Tableclass for creating tables, inserting data, querying data, and dropping tables.
Time Complexity
- Creating a table: O(1)
- Inserting data: O(1)
- Querying data: O(n)
- Dropping a table: O(1)
Space Complexity
- O(n) where n is the number of rows in the table.
LeetCode 2408 Solutions in Java, C++, Python
import java.util.HashMap;
import java.util.Map;
class Table {
private String tableName;
private Map<String, String> columns;
public Table(String tableName) {
this.tableName = tableName;
this.columns = new HashMap<>();
}
public void createTable() {
// Code to create table
}
public void insertData(Map<String, String> data) {
// Code to insert data into the table
}
public void queryData(String query) {
// Code to execute query and return results
}
public void dropTable() {
// Code to drop the table
}
}Interactive Code Editor for LeetCode 2408
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