数据库 --> sqlite3之api使用

创建

if [ ! -d /opt/dbspace ]

then

    mkdir /opt/dbspace

fi

if [ -f /opt/dbspace/.memo.db ]

then

    rm /opt/dbspace/.memo.db;

fi

if [ -f /opt/dbspace/.memo.db-journal ]

then

    rm /opt/dbspace/.memo.db-journal

fi

sqlite3 /opt/dbspace/.memo.db 'PRAGMA journal_mode = PERSIST;

    create  table memo_list (

    memo_id INTEGER PRIMARY KEY AUTOINCREMENT,

    is_selected INTEGER default ,

    time  INTEGER default ,

    year  INTEGER default ,

    month  INTEGER default ,

    day  INTEGER default ,

    hour  INTEGER default ,

    minute  INTEGER default ,

    wday  INTEGER default ,

    thumb_path TEXT NOT NULL,

    memo_text TEXT,

    image_path TEXT,

    image_x INTEGER,

    image_y INTEGER,

    image_w INTEGER,

    image_h INTEGER,

    handwrite_path TEXT,

    record_path TEXT,

    record_length INTEGER,

    UNIQUE (memo_id)

    );

'

chown : /opt/dbspace/.memo.db

chown : /opt/dbspace/.memo.db-journal

chmod  /opt/dbspace/.memo.db

chmod  /opt/dbspace/.memo.db-journal

chsmack -a 'memo::db' /opt/dbspace/.memo.db*

cmake

CMAKE_MINIMUM_REQUIRED(VERSION 2.6)

PROJECT(memo-database CXX)

INCLUDE(FindPkgConfig)

pkg_check_modules(pkgs REQUIRED

        sqlite3

        dlog

)

INCLUDE_DIRECTORIES(${pkgs_INCLUDE_DIRS})

LINK_DIRECTORIES(${pkgs_LIBRARY_DIRS})

FOREACH(flag ${pkgs_CFLAGS})

    SET(EXTRA_CFLAGS "${EXTRA_CFLAGS} ${flag}")

ENDFOREACH(flag)

SET(CMAKE_CXX_FLAGS "${EXTRA_CFLAGS} -O2 -Wall -Wcast-align -Wcast-qual -Werror -Wextra -Wnon-virtual-dtor -Wno-unused-parameter -Wshadow -Wwrite-strings -fno-omit-frame-pointer -fno-optimize-sibling-calls -fno-strict-aliasing -fsigned-char -fstrict-overflow -Wno-ignored-qualifiers -Wno-array-bounds -Wno-empty-body -Wno-error")

SET(LIB_NAME "${PROJECT_NAME}")

SET(LIB_PREFIX ${CMAKE_INSTALL_PREFIX})

SET(LIB_DIR "${LIB_PREFIX}/lib")

SET(LIB_INCLUDE_DIR "${LIB_PREFIX}/include")

SET(LIB_PKGCONFIG_DIR "/usr/lib/pkgconfig")

SET(SRCS

    src/MemoDb.cpp

)

INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/include)

ADD_LIBRARY( ${LIB_NAME} SHARED ${SRCS} )

TARGET_LINK_LIBRARIES(${LIB_NAME} ${pkgs_LDFLAGS})

CONFIGURE_FILE(${LIB_NAME}.pc.in ${LIB_NAME}.pc @ONLY)

INSTALL(TARGETS ${LIB_NAME} DESTINATION ${LIB_DIR})

INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/${LIB_NAME}.pc DESTINATION ${LIB_PKGCONFIG_DIR})

INSTALL(FILES ${CMAKE_CURRENT_SOURCE_DIR}/include/MemoDb.h DESTINATION ${LIB_INCLUDE_DIR} )

spec

Name: memo-database

Summary: app control api

Version: 0.1.

Release:

License: Flora License

Source0: %{name}-%{version}.tar.gz

BuildRequires:    cmake

BuildRequires:  pkgconfig(sqlite3)

BuildRequires:  pkgconfig(dlog)

Provides: libmemo-database.so

%description

App Control API Library

%package devel

Summary: app control api (devel)

Requires: %{name} = %{version}

%description devel

App Control API devel package

%prep

%setup -q

%build

cmake . -DVERSION=%{version} \

    -DCMAKE_INSTALL_PREFIX=%{_prefix}

make %{?jobs:-j%jobs}

%install

%make_install

%files

%{_libdir}/*.so

%manifest memo-database.manifest

%files devel

%{_libdir}/pkgconfig/%{name}.pc

%{_includedir}/*

%post

/sbin/ldconfig

if [ ! -d /opt/dbspace ]

then

    mkdir /opt/dbspace

fi

if [ -f /opt/dbspace/.memo.db ]

then

    rm /opt/dbspace/.memo.db;

fi

if [ -f /opt/dbspace/.memo.db-journal ]

then

    rm /opt/dbspace/.memo.db-journal

fi

sqlite3 /opt/dbspace/.memo.db 'PRAGMA journal_mode = PERSIST;

    create  table memo_list (

    memo_id INTEGER PRIMARY KEY AUTOINCREMENT,

    is_selected INTEGER default 0,

    time  INTEGER default 0,

    year  INTEGER default 0,

    month  INTEGER default 0,

    day  INTEGER default 0,

    hour  INTEGER default 0,

    minute  INTEGER default 0,

    wday  INTEGER default 0,

    thumb_path TEXT NOT NULL,

    memo_text TEXT,

    image_path TEXT,

    image_x INTEGER,

    image_y INTEGER,

    image_w INTEGER,

    image_h INTEGER,

    handwrite_path TEXT,

    record_path TEXT,

    record_length INTEGER,

    UNIQUE (memo_id)

    );

'

chown :5000 /opt/dbspace/.memo.db

chown :5000 /opt/dbspace/.memo.db-journal

chmod 660 /opt/dbspace/.memo.db

chmod 660 /opt/dbspace/.memo.db-journal

chsmack -a 'memo::db' /opt/dbspace/.memo.db*

头文件

#ifndef __MEMO_DB_H__

#define __MEMO_DB_H__

#include <errno.h>

#include <unistd.h>

#include <stdio.h>

#include <string.h>

#include <vector>

#include <sqlite3.h>

using std::vector;

#define DBDIR "/opt/dbspace"

#define DBFILE ".memo.db"

#define DBPATH DBDIR"/"DBFILE

#define MEMO_EMPTY_STR ""

#define MEMO_CHECK_STR(p) ((p) ? (p) : MEMO_EMPTY_STR)

typedef enum _memo_db_error

{

    MEMO_ERROR_NONE = ,/**< Success */

    MEMO_ERROR_INVALID_DATA = -,/**< Invalid parameter */

    MEMO_ERROR_NO_MEMORY = -,/**< No memory */

    MEMO_ERROR_FROM_DB = -,/**< Error from DB query */

    MEMO_ERROR_ALREADY_EXIST_ID = -,/**< Already exist private ID */

    MEMO_ERROR_FROM_DBUS = -,/**< Error from DBus */

    MEMO_ERROR_NOT_EXIST_ID = -,/**< Not exist private ID */

    MEMO_ERROR_IO = -,/**< disk i/o error */

    MEMO_ERROR_SERVICE_NOT_READY = -,/**< no reponse from master */

} memo_db_error_e;

typedef struct

{

    int nMemoId;

    bool bIsSelected;

    long int nTime;

    int nYear;

    int nMonth;

    int nDay;

    int nHour;

    int nMinute;

    int nWeekday;

    const char *strThumbPath;

    const char *strMemoText;

    char *strImagePath;

    int nImageX;

    int nImageY;

    int nImageW;

    int nImageH;

    const char *strHandwritePath;

    const char *strRecordPath;

    int nRecordLength;

}MemoDbData;

class CMemoDb

{

public:

    CMemoDb() {};

    virtual ~CMemoDb() {};

    int OpenMemoDb();

    int CloseMemoDb();

    int InsertMemoDb(MemoDbData *MemoData);

    int UpdateMemoDb(MemoDbData *MemoData);

    int DelMemoDb(int nMemoId);

    int GetDataFromDb(vector<MemoDbData> *MemoVector);

    int GetDataById(int nMemoId, MemoDbData *MemoData);

    static CMemoDb* GetInstance();

    int GetFirstData(MemoDbData *MemoData);

    int GetTop3Memo(vector<MemoDbData> *MemoVector);

private:

    int m_ExecMemoDb(const char *query);

    char *m_GetColumnText(sqlite3_stmt *stmt, int col);

    static CMemoDb* m_pMemoDbInstance;

    sqlite3 *db;

};

#endif/* __EPG_DB_H__ */

src文件

#include "MemoDb.h"

#include "dbg.h"

CMemoDb* CMemoDb::m_pMemoDbInstance = NULL;

CMemoDb* CMemoDb::GetInstance()

{

    if(m_pMemoDbInstance == NULL)

    {

        m_pMemoDbInstance = new CMemoDb();

    }

    return m_pMemoDbInstance;

}

int CMemoDb::OpenMemoDb()

{

    _DBG("OpenMemoDb------------------------------0");

    int ret = ;

    ret = sqlite3_open(DBPATH, &db);

    if (ret != SQLITE_OK)

    {

        _ERR("DB open error(%d), %s", ret, DBPATH);

        return -;

    }

    _DBG("OpenMemoDb------------------------------1");

    return ;

}

int CMemoDb::CloseMemoDb()

{

    int ret = ;

    if (!db)

    {

        return MEMO_ERROR_INVALID_DATA;

    }

    ret = sqlite3_close(db);

    if (ret != SQLITE_OK)

    {

        _ERR("DB close error(%d)", ret);

        return MEMO_ERROR_FROM_DB;

    }

    db = NULL;

    _DBG("CloseMemoDb################################");

    return MEMO_ERROR_NONE;

}

int CMemoDb::m_ExecMemoDb( const char *query)

{

    _DBG("m_ExecMemoDb,  query is %s", query);

    int ret = ;

    char *err_msg = NULL;

    if (!db)

    {

        return MEMO_ERROR_INVALID_DATA;

    }

    ret = sqlite3_exec(db, query, NULL, NULL, &err_msg);

    if (ret != SQLITE_OK)

    {

        _ERR("SQL error(%d) : %s", ret, err_msg);

        sqlite3_free(err_msg);

        return MEMO_ERROR_FROM_DB;

    }

    _DBG("m_ExecMemoDb finish");

    return MEMO_ERROR_NONE;

}

char *CMemoDb::m_GetColumnText(sqlite3_stmt *stmt, int col)

{

    const unsigned char *col_text = NULL;

    col_text = sqlite3_column_text(stmt, col);

    if (!col_text || col_text[] == '\0')

    {

        return NULL;

    }

    return strdup((char *)col_text);

}

int CMemoDb::InsertMemoDb(MemoDbData *MemoData)

{

    _DBG("InsertMemoDb");

    char *query = NULL;

    if (!db)

    {

        return MEMO_ERROR_FROM_DB;

    }

    query = sqlite3_mprintf("insert into memo_list("

            "memo_id, is_selected, "

            "time, year, month, day, hour, minute, wday, "

            "thumb_path, memo_text, image_path, "

            "image_x, image_y, image_w, image_h, "

            "handwrite_path, "

            "record_path,record_length) values ("

            "null, %d, "

            "%ld, %d, %d, %d, %d, %d, %d, "

            "'%s', '%s', '%s', "

            "%d, %d, %d, %d, "

            "'%s', "

            "'%s', %d)",

            MemoData->bIsSelected,

            MemoData->nTime,

            MemoData->nYear,

            MemoData->nMonth,

            MemoData->nDay,

            MemoData->nHour,

            MemoData->nMinute,

            MemoData->nWeekday,

            MemoData->strThumbPath,

            MemoData->strMemoText,

            MemoData->strImagePath,

            MemoData->nImageX,

            MemoData->nImageY,

            MemoData->nImageW,

            MemoData->nImageH,

            MemoData->strHandwritePath,

            MemoData->strRecordPath,

            MemoData->nRecordLength);

    if (m_ExecMemoDb((const char *)query) != MEMO_ERROR_NONE)

    {

            return MEMO_ERROR_FROM_DB;

    }

    return MEMO_ERROR_NONE;

}

int CMemoDb::UpdateMemoDb(MemoDbData *MemoData)

{

    _DBG("here should implement");

    char *query = NULL;

    if (!db)

    {

        return MEMO_ERROR_FROM_DB;

    }

    query = sqlite3_mprintf("update memo_list set "

            "is_selected = %d, "

            "time = %ld, year = %d, month = %d, day = %d, hour = %d, minute = %d, wday = %d, "

            "thumb_path = '%s', memo_text = '%s', image_path = '%s', "

            "image_x = %d, image_y = %d, image_w = %d, image_h = %d, "

            "handwrite_path = '%s', "

            "record_path = '%s', record_length = %d "

            "where memo_id = %d",

            MemoData->bIsSelected,

            MemoData->nTime,

            MemoData->nYear,

            MemoData->nMonth,

            MemoData->nDay,

            MemoData->nHour,

            MemoData->nMinute,

            MemoData->nWeekday,

            MemoData->strThumbPath,

            MemoData->strMemoText,

            MemoData->strImagePath,

            MemoData->nImageX,

            MemoData->nImageY,

            MemoData->nImageW,

            MemoData->nImageH,

            MemoData->strHandwritePath,

            MemoData->strRecordPath,

            MemoData->nRecordLength,

            MemoData->nMemoId);

    if (m_ExecMemoDb((const char *)query) != MEMO_ERROR_NONE)

    {

        return MEMO_ERROR_FROM_DB;

    }

    return MEMO_ERROR_NONE;

}

int CMemoDb::DelMemoDb(int nMemoId)

{

    char *query = NULL;

    if (!db)

    {

        return MEMO_ERROR_FROM_DB;

    }

    query = sqlite3_mprintf("delete from memo_list where memo_id = %d",

            nMemoId);

    if (m_ExecMemoDb( query) != MEMO_ERROR_NONE)

    {

        return MEMO_ERROR_FROM_DB;

    }

    return MEMO_ERROR_NONE;

}

int CMemoDb::GetDataById(int nMemoId, MemoDbData *MemoData)

{

    sqlite3_stmt *stmt;

    char *query = NULL;

    int ret;

    if (!db)

    {

        return MEMO_ERROR_FROM_DB;

    }

    query = sqlite3_mprintf("select memo_id, is_selected, "

            "time, year, month, day, hour, minute, wday, "

            "thumb_path, "

            "memo_text, "

            "image_path, "

            "image_x, "

            "image_y, "

            "image_w, "

            "image_h, "

            "handwrite_path, "

            "record_path, "

            "record_length "

            "from memo_list where memo_id = %d", nMemoId);

    ret = sqlite3_prepare(db, query, strlen(query), &stmt, NULL);

    if (ret != SQLITE_OK)

    {

        _ERR("Get count DB err(%d) : %s", ret, sqlite3_errmsg(db));

        return MEMO_ERROR_FROM_DB;

    }

    if (sqlite3_step(stmt) == SQLITE_ROW)

    {

        MemoData->bIsSelected = sqlite3_column_int(stmt, );

        MemoData->nTime = sqlite3_column_int(stmt, );

        MemoData->nYear = sqlite3_column_int(stmt, );

        MemoData->nMonth = sqlite3_column_int(stmt, );

        MemoData->nDay = sqlite3_column_int(stmt, );

        MemoData->nHour = sqlite3_column_int(stmt, );

        MemoData->nMinute = sqlite3_column_int(stmt, );

        MemoData->nWeekday = sqlite3_column_int(stmt, );

        MemoData->strThumbPath = m_GetColumnText(stmt, );

        MemoData->strMemoText= m_GetColumnText(stmt, );

        MemoData->strImagePath = m_GetColumnText(stmt, );

        MemoData->nImageX = sqlite3_column_int(stmt, );

        MemoData->nImageY = sqlite3_column_int(stmt, );

        MemoData->nImageW = sqlite3_column_int(stmt, );

        MemoData->nImageH = sqlite3_column_int(stmt, );

        MemoData->strHandwritePath = m_GetColumnText(stmt, );

        MemoData->strRecordPath = m_GetColumnText(stmt, );

        MemoData->nRecordLength= sqlite3_column_int(stmt, );

    }

    sqlite3_finalize(stmt);

    return MEMO_ERROR_NONE;

}

int CMemoDb::GetDataFromDb(vector<MemoDbData> *MemoVector)

{

    sqlite3_stmt *stmt;

    char *query = NULL;

    MemoDbData MemoData;

    int ret;

    if (!db)

    {

        return MEMO_ERROR_FROM_DB;

    }

    query = sqlite3_mprintf("select memo_id, is_selected, "

            "time, year, month, day, hour, minute, wday, "

            "thumb_path, "

            "memo_text, "

            "image_path, "

            "image_x, "

            "image_y, "

            "image_w, "

            "image_h, "

            "handwrite_path, "

            "record_path, "

            "record_length "

            "from memo_list order by time desc");

    ret = sqlite3_prepare(db, query, strlen(query), &stmt, NULL);

    if (ret != SQLITE_OK)

    {

        _ERR("Get count DB err(%d) : %s", ret, sqlite3_errmsg(db));

        return MEMO_ERROR_FROM_DB;

    }

    while(sqlite3_step(stmt) == SQLITE_ROW)

    {

        MemoData.nMemoId = sqlite3_column_int(stmt , );

        MemoData.bIsSelected = sqlite3_column_int(stmt, );

        MemoData.nTime = sqlite3_column_int(stmt, );

        MemoData.nYear = sqlite3_column_int(stmt, );

        MemoData.nMonth = sqlite3_column_int(stmt, );

        MemoData.nDay = sqlite3_column_int(stmt, );

        MemoData.nHour = sqlite3_column_int(stmt, );

        MemoData.nMinute = sqlite3_column_int(stmt, );

        MemoData.nWeekday = sqlite3_column_int(stmt, );

        MemoData.strThumbPath = m_GetColumnText(stmt, );

        MemoData.strMemoText= m_GetColumnText(stmt, );

        MemoData.strImagePath = m_GetColumnText(stmt, );

        MemoData.nImageX = sqlite3_column_int(stmt, );

        MemoData.nImageY = sqlite3_column_int(stmt, );

        MemoData.nImageW = sqlite3_column_int(stmt, );

        MemoData.nImageH = sqlite3_column_int(stmt, );

        MemoData.strHandwritePath = m_GetColumnText(stmt, );

        MemoData.strRecordPath = m_GetColumnText(stmt, );

        MemoData.nRecordLength= sqlite3_column_int(stmt, );

        MemoVector->push_back(MemoData);

    }

    sqlite3_finalize(stmt);

    return MEMO_ERROR_NONE;

}

int CMemoDb::GetFirstData(MemoDbData *MemoData)

{

    sqlite3_stmt *stmt;

    char *query = NULL;

    int ret;

    if (!db)

    {

        return MEMO_ERROR_FROM_DB;

    }

    query = sqlite3_mprintf("select memo_id, is_selected, "

            "time, year, month, day, hour, minute, wday, "

            "thumb_path, "

            "memo_text, "

            "image_path, "

            "image_x, "

            "image_y, "

            "image_w, "

            "image_h, "

            "handwrite_path, "

            "record_path, "

            "record_length "

            "from memo_list  order by time desc");

    ret = sqlite3_prepare(db, query, strlen(query), &stmt, NULL);

    if (ret != SQLITE_OK)

    {

        _ERR("Get count DB err(%d) : %s", ret, sqlite3_errmsg(db));

        return MEMO_ERROR_FROM_DB;

    }

    if (sqlite3_step(stmt) == SQLITE_ROW)

    {

        MemoData->bIsSelected = sqlite3_column_int(stmt, );

        MemoData->nTime = sqlite3_column_int(stmt, );

        MemoData->nYear = sqlite3_column_int(stmt, );

        MemoData->nMonth = sqlite3_column_int(stmt, );

        MemoData->nDay = sqlite3_column_int(stmt, );

        MemoData->nHour = sqlite3_column_int(stmt, );

        MemoData->nMinute = sqlite3_column_int(stmt, );

        MemoData->nWeekday = sqlite3_column_int(stmt, );

        MemoData->strThumbPath = m_GetColumnText(stmt, );

        MemoData->strMemoText= m_GetColumnText(stmt, );

        MemoData->strImagePath = m_GetColumnText(stmt, );

        MemoData->nImageX = sqlite3_column_int(stmt, );

        MemoData->nImageY = sqlite3_column_int(stmt, );

        MemoData->nImageW = sqlite3_column_int(stmt, );

        MemoData->nImageH = sqlite3_column_int(stmt, );

        MemoData->strHandwritePath = m_GetColumnText(stmt, );

        MemoData->strRecordPath = m_GetColumnText(stmt, );

        MemoData->nRecordLength= sqlite3_column_int(stmt, );

    }

    sqlite3_finalize(stmt);

    return MEMO_ERROR_NONE;

}

int CMemoDb::GetTop3Memo(vector<MemoDbData> *MemoVector)

{

    sqlite3_stmt *stmt;

    char *query = NULL;

    MemoDbData MemoData;

    int ret;

    if (!db)

    {

        return MEMO_ERROR_FROM_DB;

    }

    query = sqlite3_mprintf("select memo_id, is_selected, "

            "time, year, month, day, hour, minute, wday, "

            "thumb_path, "

            "memo_text, "

            "image_path, "

            "image_x, "

            "image_y, "

            "image_w, "

            "image_h, "

            "handwrite_path, "

            "record_path, "

            "record_length "

            "from memo_list where is_selected = 1 order by time desc");

    ret = sqlite3_prepare(db, query, strlen(query), &stmt, NULL);

    if (ret != SQLITE_OK)

    {

        _ERR("Get count DB err(%d) : %s", ret, sqlite3_errmsg(db));

        return MEMO_ERROR_FROM_DB;

    }

    while(sqlite3_step(stmt) == SQLITE_ROW)

    {

        MemoData.nMemoId = sqlite3_column_int(stmt , );

        MemoData.bIsSelected = sqlite3_column_int(stmt, );

        MemoData.nTime = sqlite3_column_int(stmt, );

        MemoData.nYear = sqlite3_column_int(stmt, );

        MemoData.nMonth = sqlite3_column_int(stmt, );

        MemoData.nDay = sqlite3_column_int(stmt, );

        MemoData.nHour = sqlite3_column_int(stmt, );

        MemoData.nMinute = sqlite3_column_int(stmt, );

        MemoData.nWeekday = sqlite3_column_int(stmt, );

        MemoData.strThumbPath = m_GetColumnText(stmt, );

        MemoData.strMemoText= m_GetColumnText(stmt, );

        MemoData.strImagePath = m_GetColumnText(stmt, );

        MemoData.nImageX = sqlite3_column_int(stmt, );

        MemoData.nImageY = sqlite3_column_int(stmt, );

        MemoData.nImageW = sqlite3_column_int(stmt, );

        MemoData.nImageH = sqlite3_column_int(stmt, );

        MemoData.strHandwritePath = m_GetColumnText(stmt, );

        MemoData.strRecordPath = m_GetColumnText(stmt, );

        MemoData.nRecordLength= sqlite3_column_int(stmt, );

        MemoVector->push_back(MemoData);

    }

    sqlite3_finalize(stmt);

    return MEMO_ERROR_NONE;

}

数据库 --> sqlite3之api使用的更多相关文章

sqlite3 C API编程
1,创建测试数据库,表;
Linux下用到数据库sqlite3
最近在Linux下用到数据库sqlite3,于是开始了该方面的学习. 0. 引言我们这篇文章主要讲述了如何在C/C++语言中调用 sqlite 的函数接口来实现对数据库的管理, 包括创建数据库.创建 ...
iOS开发中的4种数据持久化方式【二、数据库 SQLite3、Core Data 的运用】
在上文,我们介绍了ios开发中的其中2种数据持久化方式:属性列表.归档解档.本节将继续介绍另外2种iOS持久化数据的方法:数据库 SQLite3.Core Data 的运 ...
数据库(SQLITE3函数总结): sqlite3_open, sqlite3_exec, slite3_close,sqlite3_prepare_v2,sqlite3_column_text,
Sqlite3 的确非常好用.小巧.速度快.近期研究它,有一些收获,这里把我对 sqlite3 的研究列出来,以备忘记. 导入SQLLite library并引入头文件. libsqlite3.dyl ...
应用程序员眼中的数据库管理系统：API+数据库语言
应用程序员眼中的数据库管理系统:API+数据库语言 sqlite3_open_v2 https://www.cnblogs.com/cchust/p/5121559.html
beego的orm ,用的数据库sqlite3
测试 beego的orm ,用的数据库sqlite3 1 package main import ( "fmt" "github.com/astaxie/beego/or ...
数据库sqlite3在linux中的使用
在linux下我们首先要获取root权限当然也可是使用 sudo命令接着让我们来安装sqlite3吧!博主当然是已经安装好了! 别急,的确你是安装好了sqlite3但是有一点必须要记住,你还没有安 ...
如何在Linux下用C/C++语言操作数据库sqlite3（很不错！设计编译链接等很多问题！）
from : http://blog.chinaunix.NET/uid-21556133-id-118208.html 安装Sqlite3: 从www.sqlite.org上下载Sqlite3.2. ...
HTML5权威指南--Web Storage,本地数据库,本地缓存API,Web Sockets API,Geolocation API(简要学习笔记二)
1.Web Storage HTML5除了Canvas元素之外,还有一个非常重要的功能那就是客户端本地保存数据的Web Storage功能. 以前都是用cookies保存用户名等简单信息. 但是c ...

随机推荐

BT656跟BT1120和BT709有什么区别
601是SDTV的数据结构 656是SDTV的interface709是HDTV的数据结构 1120是HDTV的interface从数据结构上都是Y Cb Cr只是SDTV用4:2:2 HDTV ...
js、css动态压缩页面代码
1.js.css动态压缩页面代码 <%@ Page Language="C#" AutoEventWireup="true" CodeFile=" ...
python实现简单排序算法
算法递归两个特点: 调用自身有穷调用计算规模越来越小,直至最后结束用装饰器修饰一个递归函数时会出现问题,这个问题产生的原因是递归的函数也不停的使用装饰器.解决方法是,只让装饰器调用一次即可,那 ...
ASP.NET Core 新核心对象WebHost（一）
以本系列文章向Fish 前辈的那篇我心中的ASP.NET 核心对象致敬.(虽然不知道前辈现在在干什么).一晃就6年过去了,那首郝云的<回到那一天>怎么唱来着? 时光一晃,你就三十了. ...
Minimum Inversion Number~hdu 1394
The inversion number of a given number sequence a1, a2, ..., an is the number of pairs (ai, aj) that ...
内置函数：filter函数
功能: filter函数用于过滤序列,将满足条件的元素取出来构成新的序列. 用法: filter(function, iterable) 接受两个参数,第一个函数为过滤函数(返回True后者False ...
Struts2的数据封装
在很多的实际开发场景中,页面提交请求参数Action ,在Action中接收参数并对接收的数据进行封装.封装到一个JavaBean中,将JavaBean传递给业务层中.Struts2数据封装分为两类: ...
C#图解教程第十一章枚举
枚举枚举设置底层类型和显式值隐式成员编号位标志 Flags特性使用位标志的示例关于枚举的补充枚举枚举枚举是由程序员定义的类型与类或结构一样. 与结构一样,枚举是值类型,因此直接存储它们的 ...
【JLOI2015】城池攻占
左偏树加lazy操作即可 # include <stdio.h> # include <stdlib.h> # include <string.h> # inclu ...
[BZOJ1036] [ZJOI2008] 树的统计Count (LCT)
Description 一棵树上有n个节点,编号分别为1到n,每个节点都有一个权值w.我们将以下面的形式来要求你对这棵树完成一些操作: I. CHANGE u t : 把结点u的权值改为t II. Q ...

数据库 --> sqlite3之api使用

数据库 --> sqlite3之api使用的更多相关文章

随机推荐

热门专题