1. MySQL API( c ) & SQL2 Please@sparcs.kaist.ac.kr 강동훈

2. Contents Overview How to use MySQL(SQL2) How to use MySQL API (in C)

3. Overview SQL Structured Query Language based on the relational database. Data definition Data manipulation Query MySQL

4. How to use MySQL #1 Connect to MySQL Server shell> mysql -h host -u user -p password: ******** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 459 to server version: 3.22.20a-log Type 'help' for help. mysql>

5. How to use MySQL #2 Data Definition 1 mysql> SHOW DATABASES; Database mysql test tmp

6. How to use MySQL #3 Data Definition 2 mysql> CREATE DATABASE docmanager; mysql> USE docmanager Database changed mysql> SHOW TABLES; Empty set (0.00 sec) mysql> 형식 : CREATE DATABASE ; USE

7. How to use MySQL #4 Data definition 3 mysql> CREATE TABLE docmanager (title VARCHAR(40), description -> VARCHAR(40),file_name VARCHAR(20), -> enrolled DATE, updated DATE, owner VARCHAR(20)); (CF) desc 형식 : CREATE TABLE 테이블명(컬럼의 형식);

8. How to use MySQL #5 Data Manipulation 1 mysql> INSERT INTO docmanager -> VALUES( ‘ MySQL Seminar', ‘ MySQL?', ‘ MySQL.ppt', ‘ 2000-07- ‘ > 04', ’ 2000-07-05 ’, ‘ please ’ ); mysql> UPDATE docmanager SET updated= “ 2000-07-06" WHERE title= “ MySQL Seminar"; 형식: INSERT INTO 테이블명 VALUES(컬럼의 데이터 값..); UPDATE 테이블명 SET 컬럼명 = 식,… [WHERE 조건];

9. How to use MySQL #5 Data manipulation 2 mysql> SELECT * FROM docmanager; mysql> SELECT * FROM docmanager WHERE owner = “ please"; mysql> SELECT owner FROM docmanager; 형식: SELECT 컬럼명 … from 테이블명 [WHERE 조건]; titledecriptionfile_nameenrolledupdatedowner MySQL Seminar MySQL?MySQL.ppt2000-07-042000-07-06please

10. How to use MySQL API(in C) #1 Process 1.connect to SQL server 2.Quest Queries 3.manipulate result sets

11. How to use MySQL API(in C) #2 Mysql_init() Mysql_real_connect() Mysql_query()Mysql_real_query() If result set exists(only to “SELECT” Query) Mysql_store_result()Mysql_use_result() Mysql_fetch_row() Mysql_free_result() Mysql_close()

12. #include #include "mysql.h “ Int main() { MYSQL mysql; MYSQL_RES *myresult; MYSQL_ROW row; unsigned int num_fields; unsigned int num_rows; char * string_query; mysql_init(&mysql); mysql_real_connect(&mysql,"localhost","please", “ ********","please,0,NULL,0); string_query = "select * from docmanager\n"; mysql_query(&mysql,string_query); myresult = mysql_store_result(&mysql); while(row = mysql_fetch_row(myresult)) printf("%s\t %s\n",row[0],row[1]); mysql_free_result(myresult); mysql_close(&mysql); return 0; } Gcc –g –o mysqlapiexample mysqlapiexample.c –L/usr/lib/mysql –lmysqlclient

13. How to use MySQL API(in C) #4 functionprototype mysql_init() MYSQL *mysql_init(MYSQL *mysql) mysql_real_connect() MYSQL *mysql_real_connect(MYSQL *mysql,const char *host,const char *user,const char *passwd,const char *db, uint port,const char *unix_socket,uint client_flag) mysql_query() Int mysql_query(MYSQL *mysql,const char * query) mysql_real_query() Int mysql_real_query(MYSQL *mysql,const char * query, unsigned int length) mysql_store_result() MYSQL_RES *mysql_store_result(MYSQL *mysql) mysql_use_result() MYSQL_RES *musql_use_result(MYSQL *mysql) mysql_fetch_row() MYSQL_ROW mysql_fetch_row(MYSQL_RES *result) mysql_free_result() Void mysql_free_result(MYSQL_RES *result) mysql_close() Void mysql_close(MYSQL *mysql)  C API Function Description