SQLite perguntas e respostas de entrevista

Pergunta 6. How to create a table in SQLite database?

CREATE TABLE statement is used to create a table in SQLite database. You have to define the columns and data types of each column while creating the table.

CREATE TABLE my_database_name.table_name(    

column1 datatype  PRIMARY KEY(one or more columns),    

column2 datatype,    

column3 datatype,    

columnN datatype,    

);    

Pergunta 7. How would you drop a table in SQLite database?

DROP TABLE command is used to delete or permanently drop a table from SQLite database.

DROP TABLE my_table_name;

Pergunta 8. How to create an AUTOINCREMENT field?

For autoincrement, you have to declare a column of the table to be INTEGER PRIMARY KEY, then whenever you insert a NULL into that column of the table, the NULL is automatically converted into an integer which is one greater than the largest value of that column over all other rows in the table, or 1 if the table is empty.

Pergunta 9. What data types are supported by SQLite?

SQLite uses dynamic typing. Content can be stored as INTEGER, REAL, TEXT, BLOB, or as NULL.

Pergunta 10. How to insert data in a table in SQLite?

INSERT INTO statement is used to insert data in a table in SQLite database. There are two ways to insert data in table:

Syntax A:

INSERT INTO TABLE_NAME [(column1, column2, column3,...columnN)]      

VALUES (value1, value2, value3,...valueN);   

Syntax B:

INSERT INTO TABLE_NAME VALUES (value1,value2,value3,...valueN);