1, create a table
stu on behalf of the table name
sql = "Create table stu(id Integer,sex char,score float )";
Integer plastic
2, insert data
sql = "insert into stu (sex, score) values ( 'man', 98)"; // data insertion portion
sql = "insert into stu values(1,'man',99)"
3, update data
sql = "update stu set score = 99 where id = 1";
sql = "update stu set score = 99 ,sex = woman where id = 1";
4, query data
sql = "select * from stu"; // All inquiries
sql = "select * from stu limit 100"; // Query the last 100 entries
sql = "select * from stu where id = 1"; // query by the conditions, here is a query sentence with id 1
sql = "select id from stu"; // query id data of this column
5, delete statement
sql = "delete from stu where id = 1"; // delete the row with id 1
sql = "delete from stu"; // delete the entire table data
6, an increase in the table
sql = "alter table stu add column address char"; // address this increase are given in Table
7, delete the table
sql = "drop table stu";