sqlite

问题 I am creating a web application and am using flask on python along with it, I have created a registration system where the user can sign to the website and their details (email, username and password) which are saved in a sqlite3 database. I have made it so if the user enters a username or email, when registering, and that username or email is in the database it takes you back to the sign in page and does not save their data, How can I make it so when it redirects you back to the form page a

问题 I am creating a web application and am using flask on python along with it, I have created a registration system where the user can sign to the website and their details (email, username and password) which are saved in a sqlite3 database. I have made it so if the user enters a username or email, when registering, and that username or email is in the database it takes you back to the sign in page and does not save their data, How can I make it so when it redirects you back to the form page a

问题 "I got error "No Such Table" and cause me to try everything possible to make it gone, now it's gone, but i'm confuse. Here is my situation I have 2 tables need to create in the apps. and i put one class per table and it's look like code below. If i follow this it will hit me with "No Such Table" when i pull data from "Table2", so i need to change the DATABASE_NAME to some other value = "DB2"; then the "Table2" will create successfully and able to pull out data. So my question is this a

问题 Will the order of rows returned by a query will be the same as the order in which the rows were inserted into the table, of SQLite database? If Yes, Is this behaviour consistent? If No, Can this be enforced? I have a requirement of storing approx 500 rows of data, and which requires sorting/ordering from time to time. The data is in proper order, before the insertion. 回答1: Given the small number of rows in your table, this is probably what you need: SELECT * FROM yourtable ORDER BY ROWID For

问题 Will the order of rows returned by a query will be the same as the order in which the rows were inserted into the table, of SQLite database? If Yes, Is this behaviour consistent? If No, Can this be enforced? I have a requirement of storing approx 500 rows of data, and which requires sorting/ordering from time to time. The data is in proper order, before the insertion. 回答1: Given the small number of rows in your table, this is probably what you need: SELECT * FROM yourtable ORDER BY ROWID For

问题 If the result " joe@stackoverflow.com " and I want to find the position of the @ symbol (3). Is it possible? It does not appear that SQLite has the equivalent of INSTR , LOCATE , POSITION or any such function. SELECT ?('joe@stackoverflow.com') Update I ended up registering a custom extension function, but was surprised that I had to. 回答1: Retrieve filename from a path: select replace(path, rtrim(path, replace(path, '/', '' ) ), '') from example; Got from http://community.spiceworks.com/topic

问题 i'm using slide to delete from recyclerview but the problem comes when getAdapterPosition() doesn't match with the row_id of sql table. how can i get id from the adapter and how to update recyclerview when the data is added(it doesn't display new data until i reopen the app or change orientation) ? public class MainActivity extends AppCompatActivity { RecyclerView mRecyclerView; MyAdapter myAdapter; ImageButton floatButton; DbHelper dbHelper; ArrayList<Information> data; @Override protected

问题 i'm using slide to delete from recyclerview but the problem comes when getAdapterPosition() doesn't match with the row_id of sql table. how can i get id from the adapter and how to update recyclerview when the data is added(it doesn't display new data until i reopen the app or change orientation) ? public class MainActivity extends AppCompatActivity { RecyclerView mRecyclerView; MyAdapter myAdapter; ImageButton floatButton; DbHelper dbHelper; ArrayList<Information> data; @Override protected

问题 I have a sqlite database with this row of information, the ù should really be a '-' sqlite> select * from t_question where rowid=193; 193|SAT1000|having a pointed, sharp qualityùoften used to describe smells|pungent|lethargic|enigmatic|resolute|grievous When I read that row from python I get this error, what am I doing wrong? Traceback (most recent call last): File "foo_error.py", line 8, in <module> cur.execute(sql_string) sqlite3.OperationalError: Could not decode to UTF-8 column 'posit'

问题 I have a sqlite database with this row of information, the ù should really be a '-' sqlite> select * from t_question where rowid=193; 193|SAT1000|having a pointed, sharp qualityùoften used to describe smells|pungent|lethargic|enigmatic|resolute|grievous When I read that row from python I get this error, what am I doing wrong? Traceback (most recent call last): File "foo_error.py", line 8, in <module> cur.execute(sql_string) sqlite3.OperationalError: Could not decode to UTF-8 column 'posit'