sqlite

问题 SQLite doesn't support DATE/DATETIME data type. Therefore datetime can be presented in database as unix timestamp e.g. integer, number of seconds since Jan 01 1970 or as IS0-8601 string YYYY-MM-DD HH:MM:SS When datetime is stored as unix timestamp we can perform queries like this: select * from table where c1 < datetime(1452598502, 'unixepoch', 'localtime') Also if date is stored as string in the form: 2016-01-10 15:44:42 queries like upper are still correctly executed (lexicographical

问题 SQLite doesn't support DATE/DATETIME data type. Therefore datetime can be presented in database as unix timestamp e.g. integer, number of seconds since Jan 01 1970 or as IS0-8601 string YYYY-MM-DD HH:MM:SS When datetime is stored as unix timestamp we can perform queries like this: select * from table where c1 < datetime(1452598502, 'unixepoch', 'localtime') Also if date is stored as string in the form: 2016-01-10 15:44:42 queries like upper are still correctly executed (lexicographical

问题 I use SQLite for a database which I want to persist on an NFS. Any VM in my cluster might shut down at some point in which case docker swarm will spin up a replica on another VM to take over. Unfortunately the NFS seems not to support file locking so I turned it off (by mounting with "nolock") now I worry if I can be sure that the data will not be corrupted. Scenarios I could think of are: One of the VMs was simply disconnected from the internet just long enough for another replica to spin up

问题 I want to populate my Android spinner with data from a SQLite table. I already have the database controllers, and these are returning custom objects. Now what I need to do is populate the spinner with this objects, in order to get not the string field, but the Id field. For example: My table Days, with fields Id and Day: id - day 1 - Sunday 2 - Monday 3 - Tuesday... And the Day object has two properties (id, and name) I want the spinner to show "Monday", but internally, store the Id field '2'

问题 I have developed an EXE again :) The problem is it has refernces of SQLite dll file so I included the file on the same path. Now in Windows 8 it is running fine, but in Windows 7 it is not The error is System.IO.FileLoadException: Could not load file or assembly 'System.Data.SQLite, Version=1.0.90.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139' or one of its dependencies. The application has failed to start because its side-by-side configuration is incorrect. Please see the application

问题 This is the first and second activity file of the program i'm developing.. in the first file.. the user is entering a city.. which shall be searched in the database and the corresponding zipcode shall be returned. If the city is not present in the database , the user can enter the city and its zip code in the second activity file.. which is working fine. I'm having problems with the first activity file.. please help. package com.stdcode; import java.util.ArrayList; import java.util.HashMap; /

问题 I'm writing an application for the iPhone that communicates with a SQLite database but I'm running into a small problem. Whenever I try to query information based on a condition that contains an apostrophe, no results are returned.... even if a result that matches the requested condition exists. Let me give some specifics... SQLite Table Row--Column1--Column2--------- Test Data - 001 User's Data - 002 Objective-C Code //Create the sql statement sqlite3_stmt *sqlStatement; //Create the name of

问题 I'm developing a hybrid mobile app using meteorjs and cordova. App needs to have offline map support. I exported a .mbtiles file using Maperitive, of area that can be viewed offline and copied the file to my app so I can access it when loading tiles with Leaflet. For that i used cordova plugins for file system (to copy .mbtiles to the right place) and cordova sqlite plugin (for accessing .mbtiles data) and that part works, I can successfully load tile_data when leaflet requests tiles whit z,

问题 I'm currently working on a query that updates table1.state from data in table2.state based on the city field in both tables. To put it another way, When city fields in table1 and table2 match, update table1 with the state from table2. The problem I'm running into is when there isn't a city match, a random state is thrown in, like Idaho or California. Is there a way to dictate "if there is not a city match in table1 and table2 insert 'NA' into table1" table1 table2 city state city state tulsa

问题 I am trying to update records in my SQLite3 DB using the Django ORM and the update() function. I can see that after running the update() function in my standalone script, the database has in-fact been updated, but the changes are not reflected on my website until I restart gunicorn with: sudo systemctl restart gunicorn I suspect the issue has to do with the way I import my models into my standalone script. ROOT_DIR = /path/to/root/dir sys.path.insert(0, ROOT_DIR) os.environ.setdefault('DJANGO