最后一节，这里记录下如何删除数据。
前面所有的代码都继承在这里了，在Ubuntu14.04和Mac10.9上亲测通过。
#include <stdio.h>#include <stdlib.h>#include "sqlite/sqlite3.h"#define DB_NANE "sqlite/test.db"sqlite3 *db = NULL;char* sql = NULL;char *zErrMsg = NULL;const char* data = "Callback function called";int ret = 0;typedef enum{ false, true} bool;/*typedef int (*sqlite3_callback)(void*, Data provided in the 4th argument of sqlite3_exec()int, The number of columns in rowchar**, An array of strings representing fields in the rowchar** An array of strings representing column names);*/static int callback(void *NotUsed, int argc, char **argv, char **azColName){ int i = 0; for(i=0; i < argc; i++){ printf("%s = %s", azColName[i], argv[i] ? argv[i] : "NULL"); } printf(""); return 0;}bool connectDB(){ ret = sqlite3_open(DB_NANE, &db); if( ret != SQLITE_OK){ fprintf(stderr, "Error open database: %s", sqlite3_errmsg(db)); sqlite3_free(zErrMsg); return false; } fprintf(stdout, "Successfully opened database"); return true;}bool createTable(){ /* Create SQL statement */ sql = "CREATE TABLE COMPANY(" "ID INT PRIMARY KEY NOT NULL," "NAME TEXT NOT NULL," "AGE INT NOT NULL," "ADDRESS CHAR(50)," "SALARY REAL );"; /* Execute SQL statement */ ret = sqlite3_exec(db, sql, callback, 0, &zErrMsg); if( ret != SQLITE_OK ){ fprintf(stderr, "Error SQL: %s", zErrMsg); sqlite3_free(zErrMsg); return false; } fprintf(stdout, "Successfully table created"); return true;}bool insertRecords(){ /* Create SQL statement */ sql = "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) " "VALUES (1, 'Paul', 32, 'California', 20000.00 ); " "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) " "VALUES (2, 'Allen', 25, 'Texas', 15000.00 ); " "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)" "VALUES (3, 'Teddy', 23, 'Norway', 20000.00 );" "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)" "VALUES (4, 'Mark', 25, 'Rich-Mond ', 65000.00 );"; /* Execute SQL statement */ ret = sqlite3_exec(db, sql, callback, 0, &zErrMsg); if( ret != SQLITE_OK ){ fprintf(stderr, "SQL error: %s", zErrMsg); sqlite3_free(zErrMsg); return false; } fprintf(stdout, "successfully records created"); return true;}bool selectFromTable(){ /* Create SQL statement */ sql = "SELECT * from COMPANY"; /* Execute SQL statement */ ret = sqlite3_exec(db, sql, callback, (void*)data, &zErrMsg); if( ret != SQLITE_OK ){ fprintf(stderr, "Error SQL: %s", zErrMsg); sqlite3_free(zErrMsg); return false; } fprintf(stdout, "successfully operation done"); return true;}bool updateTable(){ /* Create merged SQL statement */ sql = "UPDATE COMPANY set SALARY = 25000.00 where ID=1; " "SELECT * from COMPANY"; /* Execute SQL statement */ ret = sqlite3_exec(db, sql, callback, (void*)data, &zErrMsg); if( ret != SQLITE_OK ){ fprintf(stderr, "SQL error: %s", zErrMsg); sqlite3_free(zErrMsg); return false; } fprintf(stdout, "Successfully operation done "); return true;}bool deleteTable()/*新加*/{ /* Create merged SQL statement */ sql = "DELETE from COMPANY where ID=2; " "SELECT * from COMPANY"; /* Execute SQL statement */ ret = sqlite3_exec(db, sql, callback, (void*)data, &zErrMsg); if( ret != SQLITE_OK ){ fprintf(stderr, "Error SQL: %s", zErrMsg); sqlite3_free(zErrMsg); return false; } fprintf(stdout, "Successfully operation done"); return true;}bool closeDB(){ int ret = 0; ret = sqlite3_close(db); if ( ret == SQLITE_BUSY ){ return false; } return true;}int main(int argc, char* argv[]){ connectDB(); /*createTable();*/ /*insertRecords();*/ selectFromTable(); /*updateTable();*/ deleteTable(); selectFromTable(); closeDB(); return 0;}
