C 扩展库 - sqlite3 API CRUD
CRUD
struct student
typedef struct STUDENT {
unsigned int id;
unsigned char name[16];
unsigned int age;
unsigned char address[64];
} Student;
create table
CREATE TABLE IF NOT EXISTS student(
`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
`name` TEXT NOT NULL,
`age` INT NOT NULL,
`address` TEXT NOT NULL
)
int createTable(sqlite3 *db) {
char *result = {0};
char *sql = "CREATE TABLE IF NOT EXISTS student("\
"`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," \
"`name` TEXT NOT NULL," \
"`age` INT NOT NULL," \
"`address` TEXT NOT NULL);";
int r = sqlite3_exec(db, sql, NULL, 0, &result);
if (r == SQLITE_OK) {
printf("create table success!\n");
}
return r;
}
generate student data
void generateStudent(Student *student, int count) {
// int count = 100;
// Student student[count];
int i = 0;
for (; i < count; i++) {
unsigned char name[16] = {0};
unsigned char address[64] = {0};
sprintf((char *) name, "zing%d", i);
sprintf((char *) address, "jiangsu-wuxi-%d", i);
student[i].id = (unsigned int) (1000 + i);
memcpy(student[i].name, name, sizeof(name));
student[i].age = (unsigned int) (10 + i);
memcpy(student[i].address, address, sizeof(address));
printf("%d-%s-%d-%s\n", student[i].id, student[i].name, student[i].age, student[i].address);
}
// printf("----------==ok---------\n");
// for (i = 0; i < count; ++i) {
// printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age, student[i].address);
// }
}
insert table
int insertTable(sqlite3 *db, Student student) {
char sql[128], *result = {0};
sprintf(sql, "INSERT INTO student (`name`,`age`,`address`) VALUES('%s','%d','%s')", student.name, student.age,
student.address);
int rc = sqlite3_exec(db, sql, NULL, 0, &result);
if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", result);
sqlite3_free(result);
} else {
printf("insert ok!\n");
}
return rc;
}
query table 1
int queryTable(sqlite3 *db, Student *student, int index, int count) {
char sql[128];
if (count > 10)
count = 10;
sprintf(sql, "select * from student order by id desc limit %d,%d", index, count);
printf("%s\n", sql);
char *err = NULL;
int col, row, i, j = 0;
char **result;
int rs = sqlite3_get_table(db, sql, &result, &row, &col, &err);
if (rs == SQLITE_OK) {
printf("row %d, col %d\n", row, col);
// id-name-age-address
// printf("%s-%s-%s-%s\n", result[0], result[1], result[2], result[3]);
// 1-zing0-10-jiangsu-wuxi-0
// printf("%s-%s-%s-%s\n", result[4], result[5], result[6], result[7]);
// printf("%s-%s-%s-%s\n", result[1120], result[1121], result[1122], result[1123]);
// for (i = 0; i < (row + 1) * col; i++) {
// printf("%s\n", result[i]);
// }
for (i = 0; i < (row + 1) * col; i++) {
if (i % col == 0 && i >= col) {
student[j].id = (unsigned int) atoi(result[i]);
memcpy(student[j].name, result[i + 1], sizeof(student[i].name));
student[j].age = (unsigned int) atoi(result[i + 2]);
memcpy(student[j].address, result[i + 3], sizeof(student[i].address));
// printf("id:%d,name:%s,age:%d,address:%s\n", student[j].id, student[j].name, student[j].age, student[j].address);
// printf("id:%s,name:%s,age:%s,address:%s\n", result[i], result[i + 1], result[i + 2], result[i + 3]);
j++;
}
}
} else {
printf("error\n");
}
return rs;
}
query table 2
/*
* @param stu
* @param argc
* @param argv
* @param azColName
* @return
*/
int queryCallback(void *stu, int argc, char **argv, char **azColName) {
static int j;
Student *student = stu;
student[j].id = (unsigned int) atoi(argv[0]);
memcpy(student[j].name, argv[1], sizeof(student[j].name));
student[j].age = (unsigned int) atoi(argv[2]);
memcpy(student[j].address, argv[3], sizeof(student[j].address));
j++;
// printf("\n");
// for (i = 0; i < argc; i++) {
// printf("%s = %s\n", azColName[i], argv[i] ? argv[i] : "NULL");
// }
// printf("argc-->%d\n",argc);
return 0;
}
int query(sqlite3 *db, Student *student, int index, int count) {
char sql[128];
sprintf(sql, "select * from student order by id desc limit %d,%d;", index, count);
char **err = NULL;
return sqlite3_exec(db, sql, queryCallback, student, err);
}
update table
int update(sqlite3 *db, Student student) {
char sql[128];
sprintf(sql, "UPDATE student set address = '%s' where ID=%d;", student.address, student.id);
char *err = NULL;
/* Execute SQL statement */
int rc = sqlite3_exec(db, sql, NULL, (void *) 0, &err);
if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err);
sqlite3_free(err);
} else {
fprintf(stdout, "Operation done successfully\n");
}
return rc;
}
int update2(sqlite3 *db, int id, char *address) {
char sql[128];
sprintf(sql, "UPDATE student set address = '%s' where ID=%d;", address, id);
char *err = NULL;
/* Execute SQL statement */
int rc = sqlite3_exec(db, sql, NULL, (void *) 0, &err);
if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err);
sqlite3_free(err);
} else {
fprintf(stdout, "Operation done successfully\n");
}
return rc;
}
int update3(sqlite3 *db, void *data) {
Student *student = (Student *) data;
printf("--> %d\n", student->id);
printf("--> %s\n", student->address);
char sql[128];
sprintf(sql, "UPDATE student set address = '%s' where ID=%d;", student->address, student->id);
char *err = NULL;
/* Execute SQL statement */
int rc = sqlite3_exec(db, sql, NULL, (void *) 0, &err);
if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err);
sqlite3_free(err);
} else {
fprintf(stdout, "Operation done successfully\n");
}
return rc;
}
main test
int main() {
int i = 0;
const char *name = "test.db";
sqlite3 *db;
int count = 10;
Student student[count];
int r = sqlite3_open(name, &db);
if (r == 0) {
printf("open sb success\n");
}
// generateStudent(student, count);
// printf("----------==ok---------\n");
// for (i = 0; i < count; ++i) {
// printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age, student[i].address);
// }
// createTable(db);
// for (i = 0; i < count; ++i) {
// insertTable(db, student[i]);
// }
if (queryTable(db, student, 2, 10) == SQLITE_OK) {
for (i = 0; i < count; ++i) {
printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
}
Student stu;
stu.id = 68;
char *address = "jiangsu-xuzhou";
memcpy(stu.address, address, strlen(address));
update(db, stu);
queryTable(db, student, 0, 10);
for (i = 0; i < count; ++i) {
printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
update2(db, 69, address);
queryTable(db, student, 0, 10);
for (i = 0; i < count; ++i) {
printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
address = "jiangsu-suzhou";
stu.id = 70;
memcpy(stu.address, address, strlen(address));
update3(db, &stu);
if (queryTable(db, student, 0, 10)) {
for (i = 0; i < count; ++i) {
printf("update3-> id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
}
memset(student, 0, sizeof(student));
if (query(db, student, 0, 10) == SQLITE_OK) {
for (i = 0; i < count; ++i) {
printf("update-> id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
}
sqlite3_close(db);
return 0;
}
all code
//
// Created by zhangrongxiang on 2018/2/23 14:10
// File sql
//
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sqlite3.h>
int queryCallback(void *stu, int argc, char **argv, char **azColName);
typedef struct STUDENT {
unsigned int id;
unsigned char name[16];
unsigned int age;
unsigned char address[64];
} Student;
void generateStudent(Student *student, int count) {
// int count = 100;
// Student student[count];
int i = 0;
for (; i < count; i++) {
unsigned char name[16] = {0};
unsigned char address[64] = {0};
sprintf((char *) name, "zing%d", i);
sprintf((char *) address, "jiangsu-wuxi-%d", i);
student[i].id = (unsigned int) (1000 + i);
memcpy(student[i].name, name, sizeof(name));
student[i].age = (unsigned int) (10 + i);
memcpy(student[i].address, address, sizeof(address));
printf("%d-%s-%d-%s\n", student[i].id, student[i].name, student[i].age, student[i].address);
}
// printf("----------==ok---------\n");
// for (i = 0; i < count; ++i) {
// printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age, student[i].address);
// }
}
int createTable(sqlite3 *db) {
char *result = {0};
char *sql = "CREATE TABLE IF NOT EXISTS student("\
"`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," \
"`name` TEXT NOT NULL," \
"`age` INT NOT NULL," \
"`address` TEXT NOT NULL);";
// *table = *sql;
int r = sqlite3_exec(db, sql, NULL, 0, &result);
if (r == SQLITE_OK) {
printf("create table success!\n");
}
return r;
}
int insertTable(sqlite3 *db, Student student) {
char sql[128], *result = {0};
sprintf(sql, "INSERT INTO student (`name`,`age`,`address`) VALUES('%s','%d','%s')", student.name, student.age,
student.address);
int rc = sqlite3_exec(db, sql, NULL, 0, &result);
if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", result);
sqlite3_free(result);
} else {
printf("insert ok!\n");
}
return rc;
}
/*
* @param stu
* @param argc
* @param argv
* @param azColName
* @return
*/
int queryCallback(void *stu, int argc, char **argv, char **azColName) {
static int j;
Student *student = stu;
student[j].id = (unsigned int) atoi(argv[0]);
memcpy(student[j].name, argv[1], sizeof(student[j].name));
student[j].age = (unsigned int) atoi(argv[2]);
memcpy(student[j].address, argv[3], sizeof(student[j].address));
j++;
// printf("\n");
// for (i = 0; i < argc; i++) {
// printf("%s = %s\n", azColName[i], argv[i] ? argv[i] : "NULL");
// }
// printf("argc-->%d\n",argc);
return 0;
}
int query(sqlite3 *db, Student *student, int index, int count) {
char sql[128];
sprintf(sql, "select * from student order by id desc limit %d,%d;", index, count);
char **err = NULL;
return sqlite3_exec(db, sql, queryCallback, student, err);
}
int queryTable(sqlite3 *db, Student *student, int index, int count) {
char sql[128];
if (count > 10)
count = 10;
sprintf(sql, "select * from student order by id desc limit %d,%d", index, count);
printf("%s\n", sql);
char *err = NULL;
int col, row, i, j = 0;
char **result;
int rs = sqlite3_get_table(db, sql, &result, &row, &col, &err);
if (rs == SQLITE_OK) {
printf("row %d, col %d\n", row, col);
// id-name-age-address
// printf("%s-%s-%s-%s\n", result[0], result[1], result[2], result[3]);
// 1-zing0-10-jiangsu-wuxi-0
// printf("%s-%s-%s-%s\n", result[4], result[5], result[6], result[7]);
// printf("%s-%s-%s-%s\n", result[1120], result[1121], result[1122], result[1123]);
// for (i = 0; i < (row + 1) * col; i++) {
// printf("%s\n", result[i]);
// }
for (i = 0; i < (row + 1) * col; i++) {
if (i % col == 0 && i >= col) {
student[j].id = (unsigned int) atoi(result[i]);
memcpy(student[j].name, result[i + 1], sizeof(student[i].name));
student[j].age = (unsigned int) atoi(result[i + 2]);
memcpy(student[j].address, result[i + 3], sizeof(student[i].address));
// printf("id:%d,name:%s,age:%d,address:%s\n", student[j].id, student[j].name, student[j].age, student[j].address);
// printf("id:%s,name:%s,age:%s,address:%s\n", result[i], result[i + 1], result[i + 2], result[i + 3]);
j++;
}
}
} else {
printf("error\n");
}
return rs;
}
int update(sqlite3 *db, Student student) {
char sql[128];
sprintf(sql, "UPDATE student set address = '%s' where ID=%d;", student.address, student.id);
char *err = NULL;
/* Execute SQL statement */
int rc = sqlite3_exec(db, sql, NULL, (void *) 0, &err);
if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err);
sqlite3_free(err);
} else {
fprintf(stdout, "Operation done successfully\n");
}
return rc;
}
int update2(sqlite3 *db, int id, char *address) {
char sql[128];
sprintf(sql, "UPDATE student set address = '%s' where ID=%d;", address, id);
char *err = NULL;
/* Execute SQL statement */
int rc = sqlite3_exec(db, sql, NULL, (void *) 0, &err);
if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err);
sqlite3_free(err);
} else {
fprintf(stdout, "Operation done successfully\n");
}
return rc;
}
int update3(sqlite3 *db, void *data) {
Student *student = (Student *) data;
printf("--> %d\n", student->id);
printf("--> %s\n", student->address);
char sql[128];
sprintf(sql, "UPDATE student set address = '%s' where ID=%d;", student->address, student->id);
char *err = NULL;
/* Execute SQL statement */
int rc = sqlite3_exec(db, sql, NULL, (void *) 0, &err);
if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err);
sqlite3_free(err);
} else {
fprintf(stdout, "Operation done successfully\n");
}
return rc;
}
int main() {
int i = 0;
const char *name = "test.db";
sqlite3 *db;
int count = 10;
Student student[count];
int r = sqlite3_open(name, &db);
if (r == 0) {
printf("open sb success\n");
}
// generateStudent(student, count);
// printf("----------==ok---------\n");
// for (i = 0; i < count; ++i) {
// printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age, student[i].address);
// }
// createTable(db);
// for (i = 0; i < count; ++i) {
// insertTable(db, student[i]);
// }
if (queryTable(db, student, 2, 10) == SQLITE_OK) {
for (i = 0; i < count; ++i) {
printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
}
Student stu;
stu.id = 68;
char *address = "jiangsu-xuzhou";
memcpy(stu.address, address, strlen(address));
update(db, stu);
queryTable(db, student, 0, 10);
for (i = 0; i < count; ++i) {
printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
update2(db, 69, address);
queryTable(db, student, 0, 10);
for (i = 0; i < count; ++i) {
printf("id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
address = "jiangsu-suzhou";
stu.id = 70;
memcpy(stu.address, address, strlen(address));
update3(db, &stu);
if (queryTable(db, student, 0, 10)) {
for (i = 0; i < count; ++i) {
printf("update3-> id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
}
memset(student, 0, sizeof(student));
if (query(db, student, 0, 10) == SQLITE_OK) {
for (i = 0; i < count; ++i) {
printf("update-> id:%d,name:%s,age:%d,address:%s\n", student[i].id, student[i].name, student[i].age,
student[i].address);
}
}
sqlite3_close(db);
return 0;
}
See
All rights reserved
C 扩展库 - sqlite3 API CRUD的更多相关文章
- C 扩展库 - sqlite3 API
sqlite3 API Summary sqlite3 The database connection object. Created by sqlite3_open() and destroyed ...
- C 扩展库 - mysql API CRUD
CRUD table create table if not exists `student` ( `id` int auto_increment, `name` varchar(16) not nu ...
- C 扩展库 - mysql API
MySQL API C API Data Structures MYSQL This structure represents handler for one database connection. ...
- C 扩展库 - mysql API general outline
Application programs should use this general outline for interacting with MySQL Initialize the MySQL ...
- 【小结】有关mysql扩展库和mysqli扩展库的crud操作封装
现阶段php如果要操作mysql数据库 php给我们提供了3套库 1.mysql扩展库 面向过程操作 2.mysqli扩展库 面向对象操作和面向过程操作并存 安全性和效率高于mysql扩展库 ...
- 安装php扩展库
无法加载'pdo_mysql' ,因为需要pdo这个module.PHP Warning: Cannot load module 'pdo_mysql' because required module ...
- 『Python CoolBook』C扩展库_其一_用法讲解
不依靠其他工具,直接使用Python的扩展API来编写一些简单的C扩展模块. 本篇参考PythonCookbook第15节和Python核心编程完成,值得注意的是,Python2.X和Python3. ...
- php数据库编程---mysql扩展库
1, Java有一种方式操作数据库, PHP有三种方式来操作mysql数据库.(1)mysql扩展库:(2)mysqli扩展库:(3)pdo: 2, mysql扩展库和mysql数据库区别 3, my ...
- GLEW扩展库【转】
http://blog.sina.com.cn/s/blog_4aff14d50100ydsy.html 一.关于GLEW扩展库: GLEW是一个跨平台的C++扩展库,基于OpenGL图形接口.使用O ...
随机推荐
- Lucene索引的【增、删、改、查】
前言 搞检索的,应该多少都会了解Lucene一些,它开源而且简单上手,官方API足够编写些小DEMO.并且根据倒排索引,实现快速检索.本文就简单的实现增量添加索引,删除索引,通过关键字查询,以及更新索 ...
- linux 添加用户到sudo中
步骤 1. 先切到root用户 2. 执行visudo,其实就是修改/etc/sudoers 3. 添加用户,规则如下: youuser ALL=(ALL) ALL %youuser ALL=(ALL ...
- 解决“找不到请求的 .Net Framework Data Provider。可能没有安装.”错误
问题: 这几天在装.NET 的开发环境,在装好VS2013和Oracle 11g之后,做了一个测试项目,运行调试没问题 但是涉及到数据库相关操作,如新建数据集.连接数据库等在调试的时候则会出现如下错误 ...
- C#数据结构汇总
对C#涉及到的数据结构做了一下简单的汇总,若有遗漏,欢迎补充~~ 还是以学习为目的,在此只是简单的介绍一下,希望对大家能有所帮助,能力有限为了不误导大家,不做详细深入的解析,还望见谅,非常欢迎大大们补 ...
- WP8.1StoreApp(WP8.1RT)---发送邮件和短信
在WP7/8中,发送短信是利用了EmailComposeTask和SmsComposeTask来实现的. 在WP8.1 Store App中,原来的方式已经失效,采用了新的方法:ChatMessage ...
- HBase - 数据写入流程解析
本文由 网易云发布. 作者:范欣欣 本篇文章仅限内部分享,如需转载,请联系网易获取授权. 众所周知,HBase默认适用于写多读少的应用,正是依赖于它相当出色的写入性能:一个100台RS的集群可以轻松 ...
- 【OCP题库-12c】最新CUUG OCP 071考试题库（72题）
72.View the exhibit for the structure of the STUDENTand FACULTYtables. STUDENT Name Null? Type ----- ...
- PHP之编写日志文件留后门（免杀）
(我知道你们都喜欢干货,所以也没亏待你们,请到文末吧,成果附件已上传~) 本文原创作者:Laimooc(原名xoanHn) 鄙人宗旨: 本人秉着爱学习爱恶搞爱研究爱进步并且遵纪守法的心态写下这篇文章, ...
- CTF中密码学一些基础
本文作者:i春秋签约作家MAX. 凯撒密码作为一种最为古老的对称加密体制,在古罗马的时候都已经很流行,他的基本思想是:通过把字母移动一定的位数来实现加密和解密. 给大家先找两道题,来一起探讨基础密码学 ...
- Python标准库中的生成器函数
一.用于过滤的生成器函数 - 从输入的可迭代对象中产出元素的子集,而不修改元素本身 import itertools l1 = [1,2,3,4,5] l2 = [True,False,True,Fa ...