Bài 7: Insert, Update, Delete dữ liệu - Mệnh đề Where trong SQLite - Học SQLite cơ bản

1. Câu lệnh Insert

INSERT INTO TABLE_NAME [(column1, column2, column3,...columnN)]  VALUES (value1, value2, value3,...valueN);

• column1, column2, column3,...columnN: tên của các cột trong bảng mà bạn muốn chèn dữ liệu.
• value1, value2, value3,...valueN: Giá trị sẽ chèn cho các cột tương ứng từ column1, column2, column3,...columnN.

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

sqlite> CREATE TABLE COMPANY(   ID INT PRIMARY KEY     NOT NULL,   NAME           TEXT    NOT NULL,   AGE            INT     NOT NULL,   ADDRESS        CHAR(50),   SALARY         REAL);

INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)VALUES (1, 'Paul', 32, 'California', 20000.00 );INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)VALUES (2, 'Allen', 25, 'Texas', 15000.00 );INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)VALUES (3, 'Teddy', 23, 'Norway', 20000.00 );INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)VALUES (4, 'Mark', 25, 'Rich-Mond ', 65000.00 );INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)VALUES (5, 'David', 27, 'Texas', 85000.00 );INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)VALUES (6, 'Kim', 22, 'South-Hall', 45000.00 );

INSERT INTO COMPANY VALUES (7, 'James', 24, 'Houston', 10000.00 );

ID          NAME        AGE         ADDRESS     SALARY----------  ----------  ----------  ----------  ----------1           Paul        32          California  20000.02           Allen       25          Texas       15000.03           Teddy       23          Norway      20000.04           Mark        25          Rich-Mond   65000.05           David       27          Texas       85000.06           Kim         22          South-Hall  45000.07           James       24          Houston     10000.0

INSERT INTO first_table_name [(column1, column2, ... columnN)]    SELECT column1, column2, ...columnN    FROM second_table_name   [WHERE condition];

2. Mệnh đề Where

3. Câu lệnh Update

UPDATE table_nameSET column1 = value1, column2 = value2...., columnN = valueNWHERE [condition];

ID          NAME        AGE         ADDRESS     SALARY----------  ----------  ----------  ----------  ----------1           Paul        32          California  20000.02           Allen       25          Texas       15000.03           Teddy       23          Norway      20000.04           Mark        25          Rich-Mond   65000.05           David       27          Texas       85000.06           Kim         22          South-Hall  45000.07           James       24          Houston     10000.0

sqlite> UPDATE COMPANY SET ADDRESS = 'Texas' WHERE ID = 1;

ID          NAME        AGE         ADDRESS     SALARY----------  ----------  ----------  ----------  ----------1           Paul        32          Texas       20000.02           Allen       25          Texas       15000.03           Teddy       23          Norway      20000.04           Mark        25          Rich-Mond   65000.05           David       27          Texas       85000.06           Kim         22          South-Hall  45000.07           James       24          Houston     10000.0

4. Câu lệnh Delete

DELETE FROM table_nameWHERE [condition];

sqlite> DELETE FROM COMPANY WHERE ID = 1;

ID          NAME        AGE         ADDRESS     SALARY----------  ----------  ----------  ----------  ----------2           Allen       25          Texas       15000.03           Teddy       23          Norway      20000.04           Mark        25          Rich-Mond   65000.05           David       27          Texas       85000.06           Kim         22          South-Hall  45000.07           James       24          Houston     10000.0