I'm having an issue inputting information into a Sqlite database on the app I'm creating. I was using the help of the Cursor before. I am used to MySQL although clearly not 'used to' that well.
I am trying to add to the database from a file. I had this working before but it would be added with the Cursor. I was then told that in order to make it so I could add new information to the file and have the app ONLY add the new information into the database I should use INSERT OR IGNORE.
Is this the correct syntax? I currently am not having any information inserted for whatever reason...
ourDatabase.rawQuery("INSERT OR IGNORE INTO " + DATABASE_TABLE + " ("+KEY_CLASS+",
" + KEY_QUESTION+ ") VALUES ('" + qclass + "', '" + question + "');", null);
This is my database:
"CREATE TABLE " + DATABASE_TABLE + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_CLASS + " TEXT NOT NULL, " +
KEY_QUESTION + " TEXT NOT NULL UNIQUE);
Thanks for the help in advance!
Your query seems right but try the one below anyway
ContentValues insertValues = new ContentValues();
insertValues.put(KEY_CLASS, qclass);
insertValues.put(KEY_QUESTION, question);
yourDbName.insertWithOnConflict(DATABASE_TABLE, null, insertValues, SQLiteDatabase.CONFLICT_IGNORE);
KEY_QUESTION + " TEXT NOT NULL UNIQUE);";
Related
I'm creating my first android app and I'm having difficulties using sqlite. I'm using the following code to create my table. It works fine for the 3 first columns (_ID, COL_TITLE and COL_MAX) but I can't seem to create the last column.
String createTable = "CREATE TABLE " + TaskContract.Entry.TABLE + " (" +
TaskContract.Entry._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
TaskContract.Entry.COL_TITLE + " TEXT NOT NULL, " +
TaskContract.Entry.COL_MAX + " REAL, " +
TaskContract.Entry.COL_INCREMENT + " REAL " +
");";
I tried getting the column index like this:
Cursor cursor = db.query(TaskContract.Entry.TABLE,
new String[]{TaskContract.Entry._ID,
TaskContract.Entry.COL_TITLE,
TaskContract.Entry.COL_MAX},
TaskContract.Entry._ID + " = ?",
new String[]{String.valueOf(id)},
null, null, null);
int idx_id = cursor.getColumnIndex(TaskContract.Entry._ID); //returns 0
int idx_title = cursor.getColumnIndex(TaskContract.Entry.COL_TITLE); //returns 1
int idx_max = cursor.getColumnIndex(TaskContract.Entry.COL_MAX); //returns 2
int idx_inc = cursor.getColumnIndex(TaskContract.Entry.COL_INCREMENT); //returns -1
As you can see getColumnIndex returns -1 for COL_INCREMENT
I also tried reading the data like this:
cursor.getString(3)
Looks as if the table only contains 3 column and I don't know where I went wrong. I've tried updating database version and uninstalling the app.
You need to pass TaskContract.Entry.COL_INCREMENT in your query too. Its missing out currently in your query.
Cursor cursor = db.query(TaskContract.Entry.TABLE,
new String[]{TaskContract.Entry._ID,
TaskContract.Entry.COL_TITLE,
TaskContract.Entry.COL_MAX,
TaskContract.Entry.COL_INCREMENT},
TaskContract.Entry._ID + " = ?",
new String[]{String.valueOf(id)},
null, null, null);
I am brand new to multiple tables in an SQLite database and am trying to find out what the best practices are for inserting values into multiple tables. My main question is do I need to Create another ContentValues object for inserting the values into a second table? I am really stumped on how to perform the insert(). Here is what I am trying so far.
Here are the two tables and schema
/* Creating a common attributes table here. */
private static final String CREATE_COMMON_ATTRIBUTES_TABLE = "create table "
+ COMMON_ATTRIBUTES_TABLE + "(" + DBColCons.UID_COMMON_ATTRIBUTES + " integer" +
" primary key autoincrement, " + DBColCons.GPS_POINT+ " integer not null, "
+ DBColCons.EXISTING_GRADE_GPS_POINT+ " integer not null, "
+ DBColCons.COVER+ " real not null, "+ DBColCons.NOTES+ " text, "
+ DBColCons.DATE+ " text)";
/* Creating a weld table here */
private static final String CREATE_WELD_TABLE = " create table " +WELD_TABLE+ "("
+ DBColCons.UID_WELD + " integer primary key, " + DBColCons.WELD_TYPE +
" text, " + DBColCons.WELD_ID + " text, " + DBColCons.DOWNSTREAM_JOINT +
" text, " + DBColCons.UPSTREAM_JOINT + " text, " + DBColCons.HEAT_AHEAD +
" text, " + DBColCons.LENGTH_AHEAD + " real, " + DBColCons.WALL_CHANGE +
" text, " + DBColCons.WELD_WALL_THICKNESS + " text, "
+ DBColCons.WELDER_INITIALS + " text, foreign key("+DBColCons.WELD_ID+") references" +
"("+DBColCons.GPS_POINT+"))";
Here is the method I am wanting to use for the insert() with some class getters() for the Weld class, which I am passing in as a parameter.
public boolean insertWeld(Weld weld) {
/* Get a writable copy of the database */
SQLiteDatabase db = this.getWritableDatabase();
/* Content values to insert with Weld class setters */
ContentValues contentValuesWeld = new ContentValues();
try {
contentValuesWeld.put(DBColCons.GPS_POINT, weld.getGpsPoint());
contentValuesWeld.put(DBColCons.WELD_TYPE, weld.getWeldType());
contentValuesWeld.put(DBColCons.WELD_ID, weld.getWeldId());
contentValuesWeld.put(DBColCons.DOWNSTREAM_JOINT, weld.getDownstreamJoint());
contentValuesWeld.put(DBColCons.UPSTREAM_JOINT, weld.getUpstreamJoint());
contentValuesWeld.put(DBColCons.HEAT_AHEAD, weld.getHeatAhead());
contentValuesWeld.put(DBColCons.LENGTH_AHEAD, weld.getLengthAhead());
contentValuesWeld.put(DBColCons.EXISTING_GRADE_GPS_POINT, weld.getExistingGradePoint());
contentValuesWeld.put(DBColCons.COVER, weld.getCover());
contentValuesWeld.put(DBColCons.WALL_CHANGE, weld.getWallChange());
contentValuesWeld.put(DBColCons.WELD_WALL_THICKNESS, weld.getWeldWallThickness());
contentValuesWeld.put(DBColCons.WELDER_INITIALS, weld.getWelderInitials());
contentValuesWeld.put(DBColCons.NOTES, weld.getNotes());
/* adding the date in here to the row. */
contentValuesWeld.put(DBColCons.DATE, String.valueOf(mStrDate));
/* Inserting into the weld table */
db.insertWithOnConflict(WELD_TABLE, DBColCons.WELDER_INITIALS, contentValuesWeld,
SQLiteDatabase.CONFLICT_NONE);
return true;
} catch (SQLException e) {
e.printStackTrace();
return false;
}
}
The values for DBColCons.GPS_POINT,DBColCons.EXISTING_GRADE_GPS_POINT,DBColCons.GPS_COVER and DBColCons.NOTES are what I want to insert into the Common_Attributes_Table. This is where I am really confused. Do I need to create a separate ContentValues object for those specific values and insert them into the desired table with a separate db.insert() method along with the one I am already using with the insert on the WELD_TABLE?
Help I am lost in this train wreck. Ha.
Thank you all.
You need to call insert() (or insertWithConflict()) for each table you are inserting values into. Unless the values are the same, this implies you will need another ContentValues per table.
If you intend for these inserts to be committed as a single atomic operation, consider using a transaction.
SQLiteDatabase db = ...;
db.beginTransaction();
try {
// do your inserts/etc. here
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
I have some problems with an application developed in Java that uses postgreSQL as a DB. I managed to make a dummy query as follows:
String sql = "INSERT INTO voicemessages (UNIQUEID,MSGNM,DIR,CONTEXT,MACROCONTEXT,CALLERID, ORIGTIME,DURATION, FLAG,MAILBOXUSER,MAILBOXCONTEXT,RECORDING, LABEL, read ) "
+ "VALUES (1, 1, 'dir/dir1/msgs', 'message', 'message', '6001', '15/01/2015 13:31:25', '1:32', 'flag', 'Georgi Georgiev', 'Georgi Georgiev', '12314124', 'some label', false);";
And it works perfect when I execute the statement. A row in the DB is created and I am able to display the data using:
SELECT * FROM voicemessages;
The problem is when I create my own VoiceMail class and when I create an object from this type and put in the query the getters and setters for this object I receive some kind of an error:
org.postgresql.util.PSQLException: ERROR: column "dir" does not exist Hint:There is a column named "dir" in table "voicemessages", but it cannot be referenced from this part of the query.Position: 169
I am trying to insert a row by using and executing this:
String sql = "INSERT INTO voicemessages (UNIQUEID,MSGNM,DIR,CONTEXT,MACROCONTEXT,CALLERID, ORIGTIME,DURATION, FLAG,MAILBOXUSER,MAILBOXCONTEXT,RECORDING, LABEL, read ) "
+ "VALUES (" + message01.getUniqueId() + ", " + message01.getMessageNumber() + ", " + message01.getDirectory() + ", " + message01.getContext() + ", " + message01.getMacroContext() + ", " + message01.getCallerId() + ", " +message01.getOrigTime() + ", " + message01.getDuration() + ", " + message01.getFlag() + ", " + message01.getMailboxUser() + ", " +message01.getMailboxContext() + ", " + message01.getRecording() + ", " + message01.getLabel() + ", " + message01.getRead()+ ");"+" ";
Any help or suggestion is appreciated.
Thank you in advance!
Do not use Direct values use parameters for safety, What happens is that the SQL statement you pass is parsed to prepare and compiled by the database. So by sending the actual SQL separately from the parameters, you limit the risk of SQL injection
I'm really struggling to sort some issues inserting time and dates into a table in my database that dosent seem to excist!.
I asked a question on the 'no such table' issue but didn't get an answer that sorted this issue and circumstances have changed.
Really hoping someone can help me as i cant go forward until i solve this.
Edit:
Does the logcat show im trying to insert before creating the table?
Heres my Logcat error:
01-20 23:38:24.128: E/Database(287): Error inserting app_time=00114200T000000Europe/Dublin(0,0,0,-1,0) app_alarm=false app_date=2013-01-24 app_name=gggg app_comments=a app_type=Business
01-20 23:38:24.128: E/Database(287): android.database.sqlite.SQLiteException: no such table: appointmentsTable: , while compiling: INSERT INTO appointmentsTable(app_time, app_alarm, app_date, app_name, app_comments, app_type) VALUES(?, ?, ?, ?, ?, ?);
Is it a case of this data cannot be inserted as there is no table? I have no idea why I cannot create a table. Im also confused as to why the values passed are '?'
Again here is my OnCreate method:
#Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_NAME + " TEXT NOT NULL, " +
KEY_TEL + " TEXT NOT NULL, " +
KEY_EMAIL + " TEXT NOT NULL, " +
KEY_COMMENTS + " TEXT NOT NULL);"
);
db.execSQL("CREATE TABLE " + DATABASE_TABLEAPP + " (" +
KEY_ROWAPPID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_NAMEAPP + " TEXT NOT NULL, " +
KEY_TYPEAPP + " TEXT NOT NULL, " +
KEY_TIMEAPP + " TEXT NOT NULL, " +
KEY_DATEAPP + " TEXT NOT NULL, " +
KEY_COMMENTAPP + " TEXT NOT NULL, " +
KEY_ALARM + " BOOLEAN NOT NULL);"
);
}
My insertion method:
public void createAppointmentEntry(String nameApp, String typeApp, Time timeApp, Date dateApp ,String commentApp, Boolean onOrOff) {
ContentValues cv = new ContentValues();
cv.put(KEY_NAMEAPP, nameApp);
cv.put(KEY_TYPEAPP, typeApp);
cv.put(KEY_TIMEAPP, timeApp.toString());
cv.put(KEY_DATEAPP, dateApp.toString());
cv.put(KEY_COMMENTAPP, commentApp);
cv.put(KEY_ALARM, onOrOff);
ourDatabase.insert(DATABASE_TABLEAPP, null, cv);
}
Do you see how you have your data types as " TEXT NOT NULL "? Try changing the "app_time" column to just " TEXT, " and increase the database version. Also, try downloading SQLite Viewer so that you can get a visual idea of what your db actually looks like and if the column exists.
I have an application in Android (running 4.0.3) that stores a lot of data in Table A. Table A resides in SQLite Database. I am using a ContentProvider as an abstraction layer above the database.
Lots of data here means almost 80,000 records per month. Table A is structured like this:
String SQL_CREATE_TABLE = "CREATE TABLE IF NOT EXISTS " + TABLE_A + " ( " +
COLUMN_ID + " INTEGER PRIMARY KEY NOT NULL" + "," +
COLUMN_GROUPNO + " INTEGER NOT NULL DEFAULT(0)" + "," +
COLUMN_TIMESTAMP + " DATETIME UNIQUE NOT NULL" + "," +
COLUMN_TAG + " TEXT" + "," +
COLUMN_VALUE + " REAL NOT NULL" + "," +
COLUMN_DEVICEID + " TEXT NOT NULL" + "," +
COLUMN_NEW + " NUMERIC NOT NULL DEFAULT(1)" + " )";
Here is the index statement:
String SQL_CREATE_INDEX_TIMESTAMP = "CREATE INDEX IF NOT EXISTS " + TABLE_A +
"_" + COLUMN_TIMESTAMP + " ON " + TABLE_A + " (" +
COLUMN_TIMESTAMP + ") ";
I have defined the columns as well as the table name as String Constants.
I am already experiencing significant slow down when retrieving this data from Table A. The problem is that when I retrieve data from this table, I first put it in an ArrayList and then I display it. Obviously, this is possibly the wrong way of doing things. I am trying to find a better way to approach this problem using a ContentProvider. But this is not the problem that bothers me.
The problem is for some reason, it takes a lot longer to retrieve data from other tables which have only upto 12 records maximum. I see this delay increase as the number of records in Table A increase. This does not make any sense. I can understand the delay if I retrieve data from Table A, but why the delay in retrieving data from other tables.
To clarify, I do not experience this delay if Table A is empty or has less than 3000 records.
What could be the problem?
EDIT: 09/14/2012 9:53 AM
To clarify, I am using a ContentProvider to manage the database. To query the data, I am using the context.getContentResolver().query method.
My query code in the ContentProvider:
#Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
final SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
final SQLiteDatabase db = dbHelper.getReadableDatabase();
String tableName = getTableName(uri);
queryBuilder.setTables(tableName);
Cursor cursor = queryBuilder.query(db, projection, selection, selectionArgs, null, null, sortOrder);
cursor.setNotificationUri(getContext().getContentResolver(), uri);
return cursor;
}
So this is embarrassing:
Apparently, there was one line of code somewhere during the Application Load that was retrieving data from Table A. That was what was slowing down the application as a whole.
In any case, I still have to figure out how to optimize loading data from Table A using a ContentProvider.