如何在iOS中使用SQLite使用相同的数据库路径创建多个表？

Question

I am developing an iOS application in objective-c using sqllite3 as local DB to store some data. I am trying to use multiple tables with the same db path, but it does not allow me to do so.

For instance, If I try to create multiple tables in same DB {db path as DB1} then the second table is not created.

But if I try to create different tables in different db paths, then it functions normally. ex : db path as DB1 for table T1 , DB2 for table T2 and so on.

Here is my code:

Statement to create table :

  -(int) createTable
{

    sqlite3* db = NULL;
            int rc=0;

            rc = sqlite3_open_v2([[self getDbFilePath] cStringUsingEncoding:NSUTF8StringEncoding], &db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL);
            if (SQLITE_OK != rc)
            {
                sqlite3_close(db);
                NSLog(@"Failed to open db connection");
            }
            else
            {

            char * query ="CREATE TABLE IF NOT EXISTS userinfo (id INTEGER PRIMARY KEY AUTOINCREMENT, selfuser  TEXT, pic TEXT, name TEXT, gender TEXT, link TEXT )";
                char * errMsg;
                rc = sqlite3_exec(db, query,NULL,NULL,&errMsg);

                if(SQLITE_OK != rc)
                {
                    NSLog(@"Failed to create table rc:%d, msg=%s",rc,errMsg);
                }

                sqlite3_close(db);

            query = "CREATE TABLE IF NOT EXISTS EVENTS (id INTEGER PRIMARY KEY AUTOINCREMENT, id  TEXT, info TEXT, date TEXT, no TEXT, name TEXT, time TEXT,userid TEXT, aName TEXT, day TEXT, FirstName TEXT, Pic TEXT,Accepted TEXT,rank TEXT );";

        rc = sqlite3_exec(db, query,NULL,NULL,&errMsg);
                if(SQLITE_OK != rc)
                {
                    NSLog(@"Failed to create table rc:%d, msg=%s",rc,errMsg);
                }
        sqlite3_close(db);
        }
                return rc;
    } 

Help is much appreciated, thanks in advance!

Answer 1

SQLite doesn't allow to run multiple query together statement after first; it doesn't try running SQLite query editor. In order to run more than one statement you have to run execute command that may times.

Try this way:

const char * query ="CREATE TABLE IF NOT EXISTS \\"user\\" ( \\"id\\" INTEGER PRIMARY KEY AUTOINCREMENT, \\"selfuserid\\" TEXT, \\"profilepic\\" TEXT, \\"username \\" TEXT, \\"gender\\" TEXT, \\"profilelink\\" TEXT );"

char * errMsg;
rc = sqlite3_exec(db, query,NULL,NULL,&errMsg);
if(SQLITE_OK != rc)
{
    NSLog(@"Failed to create table rc:%d, msg=%s",rc,errMsg);
}

query =  "CREATE TABLE IF NOT EXISTS  \"events\" ( \"id\" INTEGER PRIMARY KEY AUTOINCREMENT,  \"id\"  TEXT,  \"info\" TEXT,  \"date\" TEXT,  \"players\" TEXT,  \"name\" TEXT,  \"time\" TEXT, \"userid\" TEXT,  \"area\" TEXT,  \"day\" TEXT,  \"Name\" TEXT,  \"Pic\" TEXT, \"total\" TEXT, \"rank\" TEXT );";

rc = sqlite3_exec(db, query,NULL,NULL,&errMsg);
if(SQLITE_OK != rc)
{
    NSLog(@"Failed to create table rc:%d, msg=%s",rc,errMsg);
}
sqlite3_close(db);