sqlite3在Linux下的安装和使用

sqlite3在Linux下的安装和使用
2008-06-10 16:51:14| 分类：sqlite|字号订阅
一.sqlite3的安装和配置
下载sqlite3源码包
tar xvfz sqlite-src-3.3.5
cd sqlite-3.3.5
./configure –no-tcl
make
(如果在arm板上用需修改Makefile,在LIBS 项中加入–L/usr/local/arm/3.3.2/lib 保存后退出.然后再make)
安装成功后生成文件将被复制到指定目录
再加入一个环境变量
vi /etc/profile
在export区域加入SQLITE3_PATH=/usr/local/sqlite-3.3.5 保存后退出
source /etc/profile
有用文件分别为$SQLITE3_PATH/include/sqlite3.h 头文件
$SQLITE3_PATH/bin/sqlite3 可执行文件
$SQLITE3_PATH/lib/libsqlite3.a
libsqlite3.so -> libsqlite3.so.0.8.6
libsqlite3.so.0 -> libsqlite3.so.0.8.6
libsqlite3.so.0.8.6
在程序使用到数据库
#include <sqlite3.h>
在.pro文件中添加:
INCLUDEPATH +=$(SQLITE3_PATH)/include
DEPENDPATH +=$(SQLITE3_PATH)/include
LIBS +=-L$(SQLITE3_PATH)/lib
LIBS +=-lsqlite3
保存后退出
tmake hello.pro –o Makefile
make
二.程序的编写:
sqlite3 *db;
int rc = sqlite3_open(“data.db”,&db); //打开数据库data.db
if(rc!=SQLITE_OK);//打开失败
创建表rc = sqlite3_exec(db,”create table student(ID integer
primarykey,name nvarchar(32))”,NULL,NULL,&mrrmsg);
插入rc = sqlite3_exec(db,”insert into student values(…3‟,‟Zhang San‟)”,0,0,&mrrmsg);
修改rc = sqlite3_exec(db,”update student set name=‟Li Si‟ where ID=‟4‟”,0,0,&mrrmsg);删除rc = sqlite3_exec(db,”delete * from student where name=‟Wang Wu‟”,0,0,&mrrmsg);
查询是重点
回调式查询rc = sqlite3_exec(db,”select * from student where ID>2
and name<>‟Zhang San‟”,LoadInfo,NULL,&mrrmsg);
查询的结果通过LoadInfo函数来导出
typedef int(*sqlite3_callback)(void *,int char ** ,char **);
int LoadInfo(void *para, //db
int n_column, //记录的列数目
char** column_value,//查出值
char** column_name)//字段名称
{
int i;
printf(“记录含%d个字段\n”,n_column);
for(i=0;i<n_column;i++)
printf(“字段名:%s , 字段值:%s \n”,column_name[i],column_value[]i); return 0;
}
函数式查询rc = sqlite_get_table(db,”select ID from student where ID>2 and name<>‟Zhang San‟”,&result,&nrow,&ncolumn,&errmsg);
char** result;
int nrow,ncolumn;
int rc;
char* errmsg=NULL;
rc = sqlite_get_table(db,”select * f rom student where ID>2
and name<>‟Zhang San‟”,&result,&nrow,&ncolumn,&errmsg);
int i;
char id[10];
char name[10];
for(int i=1;i<=nrow;i++)
{
id[i]=result[i*2];
name[i]=result[i*2+1];
}
三.sqlite3命令:
sqlite3 data.db //打开data.db
.tables 查看数据库中包含表的信息
.schema 输出格式
.mode line / column /list //格式单行,列,列表
.timeout //用时
.output test.txt //输出到test.txt
.q退出
可执行一般的SQL语句
[root@localhost root]#sqlite3 data.db
sqlite>create table student(ID integer primary key,name nvarchar(32)); sq lite>insert into student values(1,‟Sun Wukong‟);
sqlite>insert into student values(2,‟Tang Seng‟);
sqlite>select * from student;
1|Sun Wukong
2|Tang Seng
sqlite>update student set name=‟Zhu Bajie‟ where ID=‟2‟;
sqlite>select * from student;
1|Sun Wukong
2|Zhu Bajie
sqlite>delete from student where ID=‟2‟ and name=‟ Zhu Bajie‟; sqlite>select * from student;
1|Sun Wukong
sqlite>.tables
student
对中文的支持
[root@localhost root]#sqlite3 data.db
sqlite>create table student(ID integer primary key,name text);//注意:此处name类型为text sqlite>insert into student values(1,‟孙悟空‟);
sqlite>insert into student values(2,‟唐僧‟);
sqlite>select * from student;
1|孙悟空
2|唐僧
sqlite>update student set name=‟猪八戒‟ where ID=‟2‟;
sqlite>select * from student;
1|孙悟空
2|猪八戒
sqlite>delete from stude nt where ID=‟2‟ and name=‟ 猪八戒‟;
sqlite>select * from student;。