SQLite Learning note 11:c using SQLite to delete records in the language

The last section, which records how to delete data.

All of the preceding code is inherited here, Ubuntu14.04 and Mac10.9 on the pro-test pass.

#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**, a array of strings representing fields in the rowchar** an array of string    s 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\n", Azcolname[i], argv[i]? Argv[i]: "NULL");        } printf ("\ n"); return 0;}        BOOL Connectdb () {ret = Sqlite3_open (Db_nane, &db);        if (ret! = SQLITE_OK) {fprintf (stderr, "Error Open Database:%s\n", sqlite3_errmsg (db));                Sqlite3_free (ZERRMSG);    return false; } fprintf (stdout, "succesSfully opened database\n "); return true;}      BOOL CreateTable () {/* Create SQL statement */sql = "Create TABLE Company (" "ID INT PRIMARY KEY not NULL,"         "NAME TEXT NOT NULL," "The Age INT is not null," "ADDRESS CHAR (#)," "SALARY        REAL); ";    /* Execute SQL statement */ret = sqlite3_exec (db, SQL, callback, 0, &zerrmsg);        if (ret! = SQLITE_OK) {fprintf (stderr, "Error SQL:%s\n", zerrmsg);                Sqlite3_free (ZERRMSG);    return false;        } fprintf (stdout, "successfully table created\n"); return true;} BOOL Insertrecords () {/* Create SQL statement */sql = "INSERT into Company" (id,name,age,address,salary) "VAL UES (1, ' Paul ', +, ' California ', 20000.00); "INSERT into Company" VALUES (2, ' Allen ', id,name,age,address,salary, ' Texas ', 15000.00); "" INSERT into Company (id,name,age,address,salary) "" VALUES (3, ' Teddy ', +, ' Norway ', 20000.00); ""        INSERT into Company (id,name,age,address,salary) "VALUES (4, ' Mark ', +, ' Rich-mond ', 65000.00);";    /* Execute SQL statement */ret = sqlite3_exec (db, SQL, callback, 0, &zerrmsg);        if (ret! = SQLITE_OK) {fprintf (stderr, "SQL Error:%s\n", zerrmsg);        Sqlite3_free (ZERRMSG);    return false;    } fprintf (stdout, "successfully records created\n"); 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\n", zerrmsg);        Sqlite3_free (ZERRMSG);    return false;        } fprintf (stdout, "successfully operation Done\n"); 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\n", zerrmsg);                Sqlite3_free (ZERRMSG);    return false;        } fprintf (stdout, "successfully operation done \ n"); return true;}     BOOL Deletetable ()/* NEW plus */{/* 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\n", zerrmsg);                Sqlite3_free (ZERRMSG);    return false;        } fprintf (stdout, "successfully operation Done\n"); 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;}