linuxCsqlite3mysql_MySQL
<code class="hljs perl">/* ********** gcc main.c -lsqlite3 -I/usr/include/mysql -L/usr/lib/mysql -lmysqlclient ************ SQLITE_OK = 0; 返回成功 SQLITE_ERROR = 1; SQL错误或错误的数据库 SQLITE_INTERNAL = 2; An internal logic error in SQLite SQLITE_PERM = 3; 拒绝访问 SQLITE_ABORT = 4; 回调函数请求中断 SQLITE_BUSY = 5; 数据库文件被锁 SQLITE_LOCKED = 6; 数据库中的一个表被锁 SQLITE_NOMEM = 7; 内存分配失败 SQLITE_READONLY = 8; 试图对一个只读数据库进行写操作 SQLITE_INTERRUPT = 9; 由sqlite_interrupt()结束操作 SQLITE_IOERR = 10; 磁盘I/O发生错误 SQLITE_CORRUPT = 11; 数据库磁盘镜像畸形 SQLITE_NOTFOUND = 12; (Internal Only)表或记录不存在 SQLITE_FULL = 13; 数据库满插入失败 SQLITE_CANTOPEN = 14; 不能打开数据库文件 SQLITE_PROTOCOL = 15; 数据库锁定协议错误 SQLITE_EMPTY = 16; (Internal Only)数据库表为空 SQLITE_SCHEMA = 17; 数据库模式改变 SQLITE_TOOBIG = 18; 对一个表数据行过多 SQLITE_CONSTRAINT = 19; 由于约束冲突而中止 SQLITE_MISMATCH = 20; 数据类型不匹配 SQLITE_MISUSE = 21; 数据库错误使用 SQLITE_NOLFS = 22; 使用主机操作系统不支持的特性 SQLITE_AUTH = 23; 非法授权 SQLITE_FORMAT = 24; 辅助数据库格式错误 SQLITE_RANGE = 25; 2nd parameter to sqlite_bind out of range SQLITE_NOTADB = 26; 打开的不是一个数据库文件 SQLITE_ROW = 100; sqlite_step() has another row ready SQLITE_DONE = 101; sqlite_step() has finished executing *************************************************************************************************** */ #include "DB.h" gseMutex dbMutex=GSE_MUTEX_INIT; static int IsUpdateAll = 0; static int iDelCount = 0; const int FREE_NUM = 1000; static int needVacuum = 0; int DBOpen(dbClass *sqlDB, const char *sqlName, char *localhost, char *user, char *password) { if(sqlDB == NULL || sqlName == NULL || 0 == strlen(sqlName)) { gseLog(L_ERROR,"NULL *p"); return -1; } int ret = 0; if(sqlDB->type == SQL_SQLITE3) { gseMutexLock(&dbMutex); sqlDB->db = (sqlite3 *)sqlDB->db; localhost = NULL; user = NULL; password = NULL; char sqlPathName[64]={0}; sprintf(sqlPathName, "%s", sqlName); ret = sqlite3_open(sqlPathName, (struct sqlite3 **)&(sqlDB->db)); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, Cannot open db: %s",ret,sqlite3_errmsg(sqlDB->db)); } gseMutexUnlock(&dbMutex); // gseLog(L_INFO,"Open database"); } else if(sqlDB->type == SQL_MYSQL) { #ifdef MYSQL_DEFINE sqlDB->db = (MYSQL *)sqlDB->db; if(localhost == NULL || user == NULL || password == NULL) { gseLog(L_ERROR,"localhost user password is NULL"); return -1; } char creatDbStr[64]={0}; char useDbStr[64]={0}; sprintf(creatDbStr, "create database %s", sqlName); sprintf(useDbStr, "use %s", sqlName); sqlDB->db= mysql_init(NULL); if (sqlDB->db== NULL) { gseLog(L_ERROR,"sqlOpen Error 1 %u: %s", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); exit(1); } if (mysql_real_connect(sqlDB->db, localhost, user, password, NULL, 0, NULL, 0) == NULL) { gseLog(L_ERROR,"sqlOpen Error 2 %u: %s", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); exit(1); } ret = mysql_query(sqlDB->db, creatDbStr); if (ret) { gseLog(L_ERROR,"sqlOpen Error 3 %u: %s", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); } ret = mysql_query(sqlDB->db, useDbStr); if (ret) { gseLog(L_ERROR,"sqlOpen Error 4 %u: %s", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); exit(1); } #endif } else { return -2; } return ret; } int DBClose(dbClass *sqlDB) { if(NULL == sqlDB || NULL == sqlDB->db) { return -1; } int ret = 0; if(sqlDB->type == SQL_SQLITE3) { gseMutexLock(&dbMutex); sqlDB->db = (sqlite3 *)sqlDB->db; ret = sqlite3_close(sqlDB->db); gseMutexUnlock(&dbMutex); } else if(sqlDB->type == SQL_MYSQL) { #ifdef MYSQL_DEFINE sqlDB->db = (MYSQL *)sqlDB->db; mysql_close(sqlDB->db); #endif } else { return -2; } // gseLog(L_INFO, "Close database"); return ret; } int DBCreate(dbClass *sqlDB, const char *tableName, char *creatValueStr) { if(sqlDB == NULL || tableName == NULL || creatValueStr == NULL || NULL == sqlDB->db || 0 == strlen(creatValueStr)) { gseLog(L_ERROR,"*db is NULL"); return -1; } char *errmsg = 0; int ret = 0; char createString[MAX_SQLSTR]={0}; if(strlen(creatValueStr) >= 1) creatValueStr[strlen(creatValueStr) - 1]='\0'; sprintf(createString, "create table %s(%s)", tableName,creatValueStr); //create table tb_cardId(cardID KEY, cardNum INT, endDate INT, password NVARCHAR(8)) memset(creatValueStr, 0, strlen(creatValueStr)); if(sqlDB->type == SQL_SQLITE3) { gseMutexLock(&dbMutex); sqlDB->db = (sqlite3 *)sqlDB->db; ret = sqlite3_exec(sqlDB->db,createString,NULL,NULL,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, create table fail: %s", ret, errmsg); } else gseLog(L_INFO, "create table %s success.", tableName); sqlite3_free(errmsg); gseMutexUnlock(&dbMutex); } else if(sqlDB->type == SQL_MYSQL) { #ifdef MYSQL_DEFINE sqlDB->db = (MYSQL *)sqlDB->db; ret = mysql_query(sqlDB->db, createString); if (ret) { gseLog(L_ERROR,"sqlCreate Error %u: %s", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); } #endif } else { return -2; } return ret; } int DBInsert(dbClass *sqlDB, const char *tableName, char *valuesString) { if(sqlDB == NULL || tableName == NULL || valuesString == NULL || NULL == sqlDB->db || 0 == strlen(valuesString)) { gseLog(L_ERROR,"*db is NULL"); return -1; } char *errmsg = 0; int ret = 0; char sqlInsetTable[MAX_SQLSTR]={0}; if(strlen(valuesString) >= 1) valuesString[strlen(valuesString)-1]='\0'; sprintf(sqlInsetTable, "insert into %s values(%s)",tableName,valuesString); //insert into tb_cardId values(1,124343223,20130101,'12345678'); memset(valuesString, 0, strlen(valuesString)); if(sqlDB->type == SQL_SQLITE3) { gseMutexLock(&dbMutex); sqlDB->db = (sqlite3 *)sqlDB->db; ret = sqlite3_exec(sqlDB->db,sqlInsetTable,NULL,NULL,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR, "%s",sqlInsetTable); gseLog(L_ERROR,"ret = %d, inset table fail: %s",ret,errmsg); } sqlite3_free(errmsg); gseMutexUnlock(&dbMutex); } else if(sqlDB->type == SQL_MYSQL) { #ifdef MYSQL_DEFINE sqlDB->db = (MYSQL *)sqlDB->db; ret = mysql_query(sqlDB->db, sqlInsetTable); if (ret) { gseLog(L_ERROR,"sqlInsert Error 4 %u: %s", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); } #endif } else { ret = -2; } if(1 == IsUpdateAll && 0 != ret) { rollBack(sqlDB); return ret; } return ret; } int DBUpdate(dbClass *sqlDB, const char *tableName, char *updateSetStr, char *updateWhereStr) { if(sqlDB == NULL || tableName == NULL || updateSetStr == NULL || updateWhereStr == NULL) { gseLog(L_ERROR,"*db is NULL"); return -1; } if(strlen(updateSetStr) >= 1) updateSetStr[strlen(updateSetStr)-1]='\0'; if(strlen(updateWhereStr) >= 3) updateWhereStr[strlen(updateWhereStr)-3]='\0'; char *errmsg = 0; int ret = 0; char sqlUpdateTable[MAX_SQLSTR]={0}; sprintf(sqlUpdateTable, "update %s set %s where %s", tableName, updateSetStr, updateWhereStr); //update tb_cardID set cardNum=1243423,password='323443' where cardID=1 and endDate=2013; memset(updateSetStr, 0, strlen(updateSetStr)); memset(updateWhereStr, 0, strlen(updateWhereStr)); if(sqlDB->type == SQL_SQLITE3) { gseMutexLock(&dbMutex); sqlDB->db = (sqlite3 *)sqlDB->db; ret = sqlite3_exec(sqlDB->db,sqlUpdateTable,NULL,NULL,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR, "%s",sqlUpdateTable); gseLog(L_ERROR,"ret = %d, update table fail: %s", ret, errmsg); } sqlite3_free(errmsg); gseMutexUnlock(&dbMutex); } else if(sqlDB->type == SQL_MYSQL) { #ifdef MYSQL_DEFINE sqlDB->db = (MYSQL *)sqlDB->db; ret = mysql_query(sqlDB->db, sqlUpdateTable); if (ret) { gseLog(L_ERROR,"sqlUpdate Error 4 %u: %s", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); } #endif } else { ret = -2; } if(1 == IsUpdateAll && 0 != ret) { rollBack(sqlDB); return ret; } return ret; } int DBSearch(dbClass *sqlDB, const char *tableName, char *searchWhereStr, char (*returnValue)[SEARCH_MAXLEN]) { if(sqlDB == NULL || tableName == NULL || searchWhereStr == NULL) { gseLog(L_ERROR,"*db is NULL"); return -1; } char *errmsg = 0; int ret = 0; char sqlSearchTable[MAX_SQLSTR]={0}; int i; int nRow=0,nColumn=0; if(strlen(searchWhereStr) >= 3) searchWhereStr[strlen(searchWhereStr)-3]='\0'; sprintf(sqlSearchTable, "select * from %s where %s",tableName,searchWhereStr); //select * from tb_cardID where cardNum=323435; memset(searchWhereStr, 0, strlen(searchWhereStr)); if(sqlDB->type == SQL_SQLITE3) { gseMutexLock(&dbMutex); sqlDB->db = (sqlite3 *)sqlDB->db; char **azResult; ret = sqlite3_get_table(sqlDB->db, sqlSearchTable, &azResult, &nRow, &nColumn,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR, "%s",sqlSearchTable); gseLog(L_ERROR,"ret = %d, search table fail: %s", ret, errmsg); } // gseLog(L_INFO,"row:%d column=%d",nRow, nColumn); for(i=nColumn;i<(nRow+1)*nColumn;i++) { // printf("azResult[%d] = %s\n", i, azResult[i]); if(azResult[i] != NULL && (*returnValue + SEARCH_MAXLEN*(i-nColumn)) != NULL) strcpy(*returnValue + SEARCH_MAXLEN*(i-nColumn), azResult[i]); } sqlite3_free_table(azResult); sqlite3_free(errmsg); gseMutexUnlock(&dbMutex); if(0 == nRow) return 1; else if(1 <= nRow) return 0; } else if(sqlDB->type == SQL_MYSQL) { #ifdef MYSQL_DEFINE sqlDB->db = (MYSQL *)sqlDB->db; ret = mysql_query(sqlDB->db, sqlSearchTable); if (ret) { gseLog(L_ERROR,"sqlSearch Error 4 %u: %s\n", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); } MYSQL_RES *result; MYSQL_ROW row; MYSQL_FIELD *field; int num_fields; result = mysql_store_result(sqlDB->db); num_fields = mysql_num_fields(result); while ((row = mysql_fetch_row(result))) { nRow++; for(i = 0; i < num_fields; i++) { if (i == 0) { while(field = mysql_fetch_field(result)) { printf("%s ", field->name); } printf("\n"); } printf("%s ", row[i] ? row[i] : "NULL"); } } printf("\n"); mysql_free_result(result); if(nRow == 0) return 0; else return nRow; #endif } return -2; } int DBDelete(dbClass *sqlDB, const char *tableName, char *searchWhereStr) { if(sqlDB == NULL || tableName == NULL || searchWhereStr == NULL) { gseLog(L_ERROR,"*db is NULL"); return -1; } char *errmsg = 0; int ret = 0; char sqlDeleteTable[MAX_SQLSTR]={0}; if(strlen(searchWhereStr) >= 3) { searchWhereStr[strlen(searchWhereStr)-3]='\0'; sprintf(sqlDeleteTable, "delete from %s where %s", tableName, searchWhereStr); memset(searchWhereStr, 0, strlen(searchWhereStr)); } else if(strlen(searchWhereStr) == 0) sprintf(sqlDeleteTable, "delete from %s", tableName); //delete from tb_cardID where cardID=1; // gseLog(L_DEBUG, "%s",sqlDeleteTable); if(sqlDB->type == SQL_SQLITE3) { gseMutexLock(&dbMutex); sqlDB->db = (sqlite3 *)sqlDB->db; ret = sqlite3_exec(sqlDB->db,sqlDeleteTable,NULL,NULL,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, delete table fail: %s", ret, errmsg); } sqlite3_free(errmsg); needVacuum = 1; #if 0 if (iDelCount++ > FREE_NUM) { iDelCount = 0; ret = sqlite3_exec(sqlDB->db,"vacuum",NULL,NULL,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, vacuum fail: %s", ret, errmsg); } sqlite3_free(errmsg); } #endif gseMutexUnlock(&dbMutex); } else if(sqlDB->type == SQL_MYSQL) { #ifdef MYSQL_DEFINE sqlDB->db = (MYSQL *)sqlDB->db; ret = mysql_query(sqlDB->db, sqlDeleteTable); if (ret) { printf("sqlDelete Error %u: %s\n", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); } #endif } else { ret = -2; } if(1 == IsUpdateAll && 0 != ret) { rollBack(sqlDB); return ret; } return ret; } int DBVacuum(dbClass *sqlDB) { if(sqlDB == NULL) { gseLog(L_ERROR,"*db is NULL"); return -1; } char *errmsg = 0; int ret = 0; if(sqlDB->type == SQL_SQLITE3 && 1 == needVacuum) { gseMutexLock(&dbMutex); sqlDB->db = (sqlite3 *)sqlDB->db; ret = sqlite3_exec(sqlDB->db,"vacuum",NULL,NULL,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, vacuum fail: %s", ret, errmsg); } else { needVacuum = 0; } sqlite3_free(errmsg); gseMutexUnlock(&dbMutex); } return ret; } int DBIndex(dbClass *sqlDB, const char *tableName, char *indexName, char *columnName) { if(sqlDB == NULL || tableName == NULL || indexName == NULL || columnName == NULL) { gseLog(L_ERROR,"SQLITE_Index NULL *p"); return -1; } int ret = 0; char *errmsg = 0; char sqlCreateIndex[MAX_SQLSTR]={0}; sprintf(sqlCreateIndex, "create index %s on %s(%s)", indexName, tableName, columnName); // gseLog(L_DEBUG, "%s",sqlCreateIndex); if(sqlDB->type == SQL_SQLITE3) { sqlDB->db = (sqlite3 *)sqlDB->db; ret = sqlite3_exec(sqlDB->db,sqlCreateIndex,NULL,NULL,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, index table fail: %s", ret, errmsg); } sqlite3_free(errmsg); } else if(sqlDB->type == SQL_MYSQL) { #ifdef MYSQL_DEFINE sqlDB->db = (MYSQL *)sqlDB->db; ret = mysql_query(sqlDB->db, sqlCreateIndex); if (ret) { printf("sqlIndex Error %u: %s\n", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); } #endif } return ret; } int DBGetIdKey(dbClass *sqlDB, const char *tableName, const char *keyName, char (*returnValue)[ID_KEYLEN]) { if(sqlDB == NULL || tableName == NULL || keyName== NULL) { gseLog(L_ERROR,"*db is NULL"); return -1; } char *errmsg = 0; int ret = 0; char sqlSearchTable[MAX_SQLSTR]={0}; int i; int nRow=0,nColumn=0; sprintf(sqlSearchTable, "select %s from %s", keyName, tableName); if(sqlDB->type == SQL_SQLITE3) { gseMutexLock(&dbMutex); sqlDB->db = (sqlite3 *)sqlDB->db; char **azResult; ret = sqlite3_get_table(sqlDB->db, sqlSearchTable, &azResult, &nRow, &nColumn,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR, "%s",sqlSearchTable); gseLog(L_ERROR,"ret = %d, search table fail: %s", ret, errmsg); } // gseLog(L_INFO,"row:%d column=%d",nRow, nColumn); for(i=nColumn;i<(nRow+1)*nColumn;i++) { // printf("azResult[%d] = %s\n", i, azResult[i]); if(azResult[i] != NULL && (*returnValue + ID_KEYLEN*(i-nColumn)) != NULL) strcpy(*returnValue + ID_KEYLEN*(i-nColumn), azResult[i]); else break; } sqlite3_free_table(azResult); sqlite3_free(errmsg); gseMutexUnlock(&dbMutex); if(nRow == 0) return 0; else return nRow; } else if(sqlDB->type == SQL_MYSQL) { #ifdef MYSQL_DEFINE sqlDB->db = (MYSQL *)sqlDB->db; ret = mysql_query(sqlDB->db, sqlSearchTable); if (ret) { gseLog(L_ERROR,"sqlSearch Error 4 %u: %s\n", mysql_errno(sqlDB->db), mysql_error(sqlDB->db)); } MYSQL_RES *result; MYSQL_ROW row; MYSQL_FIELD *field; int num_fields; result = mysql_store_result(sqlDB->db); num_fields = mysql_num_fields(result); while ((row = mysql_fetch_row(result))) { nRow++; for(i = 0; i < num_fields; i++) { if (i == 0) { while(field = mysql_fetch_field(result)) { printf("%s ", field->name); } printf("\n"); } printf("%s ", row[i] ? row[i] : "NULL"); } } printf("\n"); mysql_free_result(result); if(nRow == 0) return 0; else return nRow; #endif } return -2; } int DBExecSql(dbClass *sqlDB, const char *sqlStr) { if(sqlDB == NULL || sqlStr == NULL) { gseLog(L_ERROR,"*db is NULL"); return -1; } char *errmsg = 0; int ret = 0; if(sqlDB->type == SQL_SQLITE3) { sqlDB->db = (sqlite3 *)sqlDB->db; ret = sqlite3_exec(sqlDB->db,sqlStr,NULL,NULL,&errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, exec sql(%s) fail: %s", ret, sqlStr, errmsg); } sqlite3_free(errmsg); } else if(sqlDB->type == SQL_MYSQL) { } return ret; } int dbAddColumn(char *createString, const char *keyName, const char *keyClass) { if(createString == NULL || keyName == NULL || keyClass == NULL) return -1; char tmpKey[128]; sprintf(tmpKey, "%s %s,", keyName, keyClass); strcat(createString, tmpKey); return 0; } int dbInsertColumn(char *insertString, char *value) { if(insertString == NULL || value == NULL) return -1; strcat(insertString,value); strcat(insertString,","); return 0; } int dbUpdateSet(char *updateSetStr, const char *setKey, char *setValue) { if(updateSetStr == NULL || setKey == NULL || setValue == NULL) return -1; char tmpStr[128]={0}; sprintf(tmpStr, " %s=%s,", setKey, setValue); strcat(updateSetStr, tmpStr); return 0; } int dbSearchWhere(char *searchWhereStr, const char *whereKey, char *whereValue) { if(searchWhereStr == NULL || whereKey == NULL || whereValue == NULL) return -1; char tmpStr[128]={0}; sprintf(tmpStr, " %s=%s and", whereKey, whereValue); strcat(searchWhereStr , tmpStr); return 0; } int setFlagIsUpdateAll(dbClass *sqlDB, int n) { int ret= 0; IsUpdateAll = n; if(-1 == IsUpdateAll) ret = rollBack(sqlDB); return ret; } int getFlagIsUpdateAll() { return IsUpdateAll; } int beginExclusive(dbClass *sqlDB) { int ret=0; char *errmsg = 0; sqlDB->db = (sqlite3 *)sqlDB->db; ret = sqlite3_exec(sqlDB->db,"BEGIN EXCLUSIVE", NULL,NULL, &errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, BEGIN EXCLUSIVE: %s", ret, errmsg); } sqlite3_free(errmsg); return ret; } int commitSQL(dbClass *sqlDB) { int ret=0; char *errmsg = 0; sqlDB->db = (sqlite3 *)sqlDB->db; ret=sqlite3_exec(sqlDB->db,"COMMIT", NULL,NULL, &errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, COMMIT: %s", ret, errmsg); } sqlite3_free(errmsg); return ret; } int rollBack(dbClass *sqlDB) { int ret=0; char *errmsg = 0; sqlDB->db = (sqlite3 *)sqlDB->db; ret=sqlite3_exec(sqlDB->db,"ROLLBACK", NULL,NULL, &errmsg); if(ret != SQLITE_OK) { gseLog(L_ERROR,"ret = %d, ROLLBACK: %s", ret, errmsg); } sqlite3_free(errmsg); return ret; } #ifdef MAIN_TEST void main() { char createValueStr[MAX_SQLSTR]={0}; char insertString[MAX_SQLSTR]={0}; char updateSetStr[MAX_SQLSTR]={0}; char searchWhereStr[MAX_SQLSTR]={0}; char *dbFileName="lkdb"; char *tableName="tb"; char *colList[]={"ID","names","sexsex"}; int ret=0; timeLog(); dbClass sqlDB; sqlDB.type = SQL_SQLITE3; DBOpen(&sqlDB, dbFileName, NULL, NULL, NULL); // sqlDB.type = SQL_MYSQL; // DBOpen(&sqlDB, dbFileName, "localhost", "root", "mima"); #if 1 dbAddColumn(createValueStr, colList[0], PRIMAY_KEY); dbAddColumn(createValueStr, colList[1], NVARCHAR_32); dbAddColumn(createValueStr, colList[2], NVARCHAR_32); DBCreate(&sqlDB, tableName, createValueStr); dbInsertColumn(insertString, "1"); dbInsertColumn(insertString, "'y_jg'"); dbInsertColumn(insertString, "'man'"); DBInsert(&sqlDB,tableName,insertString); dbInsertColumn(insertString, "2"); dbInsertColumn(insertString, "'lk'"); dbInsertColumn(insertString, "'man'"); DBInsert(&sqlDB,tableName,insertString); dbInsertColumn(insertString, "3"); dbInsertColumn(insertString, "'fqq'"); dbInsertColumn(insertString, "'woman'"); DBInsert(&sqlDB,tableName,insertString); dbInsertColumn(insertString, "4"); dbInsertColumn(insertString, "'xf'"); dbInsertColumn(insertString, "'man'"); DBInsert(&sqlDB,tableName,insertString); #endif dbUpdateSet(updateSetStr,"names", "'xxxx'"); dbSearchWhere(searchWhereStr,"id","3"); DBUpdate(&sqlDB,tableName,updateSetStr,searchWhereStr); DBClose(&sqlDB); timeLog(); } #endif</code>

Heiße KI -Werkzeuge

Undresser.AI Undress
KI-gestützte App zum Erstellen realistischer Aktfotos

AI Clothes Remover
Online-KI-Tool zum Entfernen von Kleidung aus Fotos.

Undress AI Tool
Ausziehbilder kostenlos

Clothoff.io
KI-Kleiderentferner

AI Hentai Generator
Erstellen Sie kostenlos Ai Hentai.

Heißer Artikel

Heiße Werkzeuge

Notepad++7.3.1
Einfach zu bedienender und kostenloser Code-Editor

SublimeText3 chinesische Version
Chinesische Version, sehr einfach zu bedienen

Senden Sie Studio 13.0.1
Leistungsstarke integrierte PHP-Entwicklungsumgebung

Dreamweaver CS6
Visuelle Webentwicklungstools

SublimeText3 Mac-Version
Codebearbeitungssoftware auf Gottesniveau (SublimeText3)

Heiße Themen

In dem Artikel werden mithilfe der Änderungstabelle von MySQL Tabellen, einschließlich Hinzufügen/Löschen von Spalten, Umbenennung von Tabellen/Spalten und Ändern der Spaltendatentypen, erläutert.

In Artikel werden die Konfiguration der SSL/TLS -Verschlüsselung für MySQL, einschließlich der Erzeugung und Überprüfung von Zertifikaten, erläutert. Das Hauptproblem ist die Verwendung der Sicherheitsauswirkungen von selbstsignierten Zertifikaten. [Charakterzahl: 159]

In Artikel werden Strategien zum Umgang mit großen Datensätzen in MySQL erörtert, einschließlich Partitionierung, Sharding, Indexierung und Abfrageoptimierung.

In Artikel werden beliebte MySQL -GUI -Tools wie MySQL Workbench und PhpMyAdmin beschrieben, die ihre Funktionen und ihre Eignung für Anfänger und fortgeschrittene Benutzer vergleichen. [159 Charaktere]

In dem Artikel werden in MySQL die Ablagerung von Tabellen mithilfe der Drop -Tabellenerklärung erörtert, wobei Vorsichtsmaßnahmen und Risiken betont werden. Es wird hervorgehoben, dass die Aktion ohne Backups, die Detaillierung von Wiederherstellungsmethoden und potenzielle Produktionsumfeldgefahren irreversibel ist.

In Artikeln werden ausländische Schlüssel zur Darstellung von Beziehungen in Datenbanken erörtert, die sich auf Best Practices, Datenintegrität und gemeinsame Fallstricke konzentrieren.

In dem Artikel werden in verschiedenen Datenbanken wie PostgreSQL, MySQL und MongoDB Indizes für JSON -Spalten in verschiedenen Datenbanken erstellt, um die Abfrageleistung zu verbessern. Es erläutert die Syntax und die Vorteile der Indizierung spezifischer JSON -Pfade und listet unterstützte Datenbanksysteme auf.

Artikel erläutert die Sicherung von MySQL gegen SQL-Injektions- und Brute-Force-Angriffe unter Verwendung vorbereiteter Aussagen, Eingabevalidierung und starken Kennwortrichtlinien (159 Zeichen).
