Get id of sqlite database row according to content query
I am trying to delete an item from my sqlite database
public Integer deleteData (String id){
SQLiteDatabase db = this.getWritableDatabase();
return db.delete(TABLE_NAME, "id" + "=?", new String{id});
}
So far, the delete query works well. But i am having difficulties to find the particular id of a particular row.
I was trying to query the data according to a particular field content.
public Integer getId(String desc, Integer id){
SQLiteDatabase db = this.getWritableDatabase();
db.rawQuery("SELECT id FROM fap_table WHERE description = '"+desc+"'" , null);
return id;
}
But i keep getting errors. How do i query the database row to retrieve its id. Please help.
sqlite
asked Nov 19 '18 at 18:12
ChukwumaChukwuma
95
add a comment |
I am trying to delete an item from my sqlite database
public Integer deleteData (String id){
SQLiteDatabase db = this.getWritableDatabase();
return db.delete(TABLE_NAME, "id" + "=?", new String{id});
}
So far, the delete query works well. But i am having difficulties to find the particular id of a particular row.
I was trying to query the data according to a particular field content.
public Integer getId(String desc, Integer id){
SQLiteDatabase db = this.getWritableDatabase();
db.rawQuery("SELECT id FROM fap_table WHERE description = '"+desc+"'" , null);
return id;
}
But i keep getting errors. How do i query the database row to retrieve its id. Please help.
sqlite
asked Nov 19 '18 at 18:12
ChukwumaChukwuma
95
add a comment |
I am trying to delete an item from my sqlite database
public Integer deleteData (String id){
SQLiteDatabase db = this.getWritableDatabase();
return db.delete(TABLE_NAME, "id" + "=?", new String{id});
}
So far, the delete query works well. But i am having difficulties to find the particular id of a particular row.
I was trying to query the data according to a particular field content.
public Integer getId(String desc, Integer id){
SQLiteDatabase db = this.getWritableDatabase();
db.rawQuery("SELECT id FROM fap_table WHERE description = '"+desc+"'" , null);
return id;
}
But i keep getting errors. How do i query the database row to retrieve its id. Please help.
sqlite
asked Nov 19 '18 at 18:12
ChukwumaChukwuma
95
I am trying to delete an item from my sqlite database
public Integer deleteData (String id){
SQLiteDatabase db = this.getWritableDatabase();
return db.delete(TABLE_NAME, "id" + "=?", new String{id});
}
So far, the delete query works well. But i am having difficulties to find the particular id of a particular row.
I was trying to query the data according to a particular field content.
public Integer getId(String desc, Integer id){
SQLiteDatabase db = this.getWritableDatabase();
db.rawQuery("SELECT id FROM fap_table WHERE description = '"+desc+"'" , null);
return id;
}
But i keep getting errors. How do i query the database row to retrieve its id. Please help.
sqlite
sqlite
asked Nov 19 '18 at 18:12
ChukwumaChukwuma
95
asked Nov 19 '18 at 18:12
ChukwumaChukwuma
95
edited Nov 19 '18 at 18:19
Chukwuma
asked Nov 19 '18 at 18:12
ChukwumaChukwuma
95
asked Nov 19 '18 at 18:12
ChukwumaChukwuma
95
asked Nov 19 '18 at 18:12
ChukwumaChukwuma
95
95
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Use this code to fetch the id:
public int getRow(String desc){
int id = 0;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT id FROM fap_table WHERE description = '"+desc+"'" , null);
if (cursor != null) {
if (cursor.moveToFirst())
id = cursor.getInt(0);
cursor.close();
}
db.close();
return id;
}
Your code had the error to not assign the result of db.rawQuery() to a cursor object. db.rawQuery() returns the cursor you need and from this you extract the only column (if it exists) which is the id.
In case the cursor is empty you return 0.
answered Nov 19 '18 at 18:19
forpasforpas
12.5k3424
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Use this code to fetch the id:
public int getRow(String desc){
int id = 0;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT id FROM fap_table WHERE description = '"+desc+"'" , null);
if (cursor != null) {
if (cursor.moveToFirst())
id = cursor.getInt(0);
cursor.close();
}
db.close();
return id;
}
Your code had the error to not assign the result of db.rawQuery() to a cursor object. db.rawQuery() returns the cursor you need and from this you extract the only column (if it exists) which is the id.
In case the cursor is empty you return 0.
answered Nov 19 '18 at 18:19
forpasforpas
12.5k3424
add a comment |
Use this code to fetch the id:
public int getRow(String desc){
int id = 0;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT id FROM fap_table WHERE description = '"+desc+"'" , null);
if (cursor != null) {
if (cursor.moveToFirst())
id = cursor.getInt(0);
cursor.close();
}
db.close();
return id;
}
Your code had the error to not assign the result of db.rawQuery() to a cursor object. db.rawQuery() returns the cursor you need and from this you extract the only column (if it exists) which is the id.
In case the cursor is empty you return 0.
answered Nov 19 '18 at 18:19
forpasforpas
12.5k3424
add a comment |
Use this code to fetch the id:
public int getRow(String desc){
int id = 0;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT id FROM fap_table WHERE description = '"+desc+"'" , null);
if (cursor != null) {
if (cursor.moveToFirst())
id = cursor.getInt(0);
cursor.close();
}
db.close();
return id;
}
Your code had the error to not assign the result of db.rawQuery() to a cursor object. db.rawQuery() returns the cursor you need and from this you extract the only column (if it exists) which is the id.
In case the cursor is empty you return 0.
answered Nov 19 '18 at 18:19
forpasforpas
12.5k3424
Use this code to fetch the id:
public int getRow(String desc){
int id = 0;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT id FROM fap_table WHERE description = '"+desc+"'" , null);
if (cursor != null) {
if (cursor.moveToFirst())
id = cursor.getInt(0);
cursor.close();
}
db.close();
return id;
}
Your code had the error to not assign the result of db.rawQuery() to a cursor object. db.rawQuery() returns the cursor you need and from this you extract the only column (if it exists) which is the id.
In case the cursor is empty you return 0.
answered Nov 19 '18 at 18:19
forpasforpas
12.5k3424
answered Nov 19 '18 at 18:19
forpasforpas
12.5k3424
answered Nov 19 '18 at 18:19
forpasforpas
12.5k3424
answered Nov 19 '18 at 18:19
forpasforpas
12.5k3424
12.5k3424
add a comment |
add a comment |
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