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

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

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