sqlite

How to upgrade db from windows phone 8 to windows phone 8.1

由 ￡可爱￡侵袭症＋ 提交于 2020-01-15 11:22:20
问题 I have read that SQL CE is not supported on 8.1 universal apps. I have an app published in market place using SQL CE. I want to make this app as universal app. How do I handle upgrade in such scenario? How do I upgrade SQL CE from silverlight app to SQL lite universal app?? Any ideas? 回答1: Currently I am saving the data into a file. Since the file will remain in the same format on 8.1. I read the file on 8.1, transform the data into my new model and save it in the new db schema. I am using

sqlite: dropping a table in a transaction?

由 浪尽此生 提交于 2020-01-15 11:05:10
问题 I have a simple, single table sqlite3 database file that has exactly one table. There are no keys, foreign or domestic. There are no triggers. I have the following workflow: If the database file exixts open it. Start exclusive transaction Select all rows from the table in order. Operate on each row. Delete each operated-on row. When done, count the number of remaining rows in the table, if 0 then DROP the table then unlink the database file Commit or Rollback the transaction The drop-table

c#, Is it possible to define databinding from sqlite database to c# object typesave?

由 旧巷老猫 提交于 2020-01-15 10:52:27
问题 I have the following class hirarchy: public class A { public string A_string; public int A_int; public double A_double; public B BInstance; } public class B { public string B_string; public int B_int; public double B_double; public C CInstance; } public class C { public string C_string; public int C_int; public double C_double; } and need a mapping to the following database values: +--------------+-----------+--------------+---------------------+-------------------+----------------------+----

c#, Is it possible to define databinding from sqlite database to c# object typesave?

由 倾然丶 夕夏残阳落幕 提交于 2020-01-15 10:51:22
问题 I have the following class hirarchy: public class A { public string A_string; public int A_int; public double A_double; public B BInstance; } public class B { public string B_string; public int B_int; public double B_double; public C CInstance; } public class C { public string C_string; public int C_int; public double C_double; } and need a mapping to the following database values: +--------------+-----------+--------------+---------------------+-------------------+----------------------+----

What executes SQL commands submitted by an application program, if no DBMS is running?

由 橙三吉。 提交于 2020-01-15 10:33:45
问题 When you are writing a program which uses a database driver, from Why is programming interface to database called driver? There are databases that allow you to embed them within your process (like sqlite) , but if you're working with a database that has its own process[es] (like postgresql), then yes, it(they) must be up and running in order to work against that database. So some databases "allow you to embed them within your process (like sqlite)". If there is no DMBS running, to what does

How to connect to a protected Sqlite3 database with Python

由 北慕城南 提交于 2020-01-15 09:45:06
问题 I created a SQLite3 database and protected it with a password ("test") thanks to the application DB browser for SQLite . In order to connect to my database via Python , I need to provide the password but I can't figure out how to do that. I tried the following code: conn=sqlite3.connect("mydatabase.db", Password="test") cur=conn.cursor() EDIT: My SQLite3 database has been encrypted with SQLCipher (see image). If I run the following code: conn=sqlite3.connect("mydatabase.db") cur=conn.cursor()

SQLite access using Powershell and PSSqlite - SELECT query fails

由 折月煮酒 提交于 2020-01-15 09:34:44
问题 I am trying to write a Powershell script to write data to a SQLite database and to read from it. I'm using the PSSQLite module to do this. The script works on one server, but not on the other. Both machines are Windows 2012 R2. Both machines look like this: PS C:\> $PSVersionTable Name Value ---- ----- PSVersion 5.0.10586.117 PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...} BuildVersion 10.0.10586.117 CLRVersion 4.0.30319.42000 WSManStackVersion 3.0 PSRemotingProtocolVersion 2.3

嵌入式项目数据解决方案之sqlite

由 蓝咒 提交于 2020-01-15 09:28:54
sqlite当前的版本为3 1. 介绍 SQLite 是一个开源的嵌入式关系数据库，实现自包容、零配置、支持事务的SQL数据库引擎。 其特点是高度便携、使用方便、结构紧凑、高效、可靠。 与其他数据库管理系统不同，SQLite 的安装和运行非常简单，在大多数情况下 - 只要确保SQLite的二进制文件存在即可开始创建、连接和使用数据库。如果您正在寻找一个嵌入式数据库项目或解决方案，SQLite是绝对值得考虑。 2. 安装 SQLite on Windows 1）进入 SQL 下载页面： http://www.sqlite.org/download.html 2）下载 Windows 下的预编译二进制文件包： sqlite-shell-win32-x86-<build#>.zip sqlite-dll-win32-x86-<build#>.zip 注意: <build#> 是 sqlite 的编译版本号 将 zip 文件解压到你的磁盘，并将解压后的目录添加到系统的 PATH 变量中，以方便在命令行中执行 sqlite 命令。 可选: 如果你计划发布基于 sqlite 数据库的应用程序，你还需要下载源码以便编译和利用其 API sqlite-amalgamation-<build#>.zip SQLite on Linux 在 多个 Linux 发行版提供了方便的命令来获取 SQLite

Translate SQLite query, with subquery, into Peewee statement

由 99封情书 提交于 2020-01-15 09:26:07
问题 I've got a SQL statement that does what I need, but I'm having trouble converting it into the correlated Peewee statement. Here's the SQL I have now, note that I'm using a subquery right now, but I don't care that it's a subquery either way. select t.name, count(a.type_id) as total, ( select count(id) from assignment a where a.course_id = 7 and a.due_date < date() and a.type_id = t.id group by a.type_id order by a.type_id ) as completed from assignment a inner join type t on t.id = a.type_id

SQLLite time entry and time exit from eventime

由 送分小仙女□ 提交于 2020-01-15 09:13:30
问题 I have two tables, DATA and EVENTS , with the following data: EVENTS EventIndex ObjID LocID EventData EventTime EventType 83707365 3519434 10376 0 2013-05-19 11:32:11 137 83707849 3519434 10374 0 2013-05-19 11:35:18 137 83714233 888799 10376 0 2013-05-19 12:24:45 137 83715200 888799 10184 0 2013-05-19 12:32:18 137 DATA EventIndex TagName TagValue 83714233 ObjName Peter 83714233 LocName H118 83715200 ObjName Peter 83715200 LocName H116 83707365 ObjName John 83707365 LocName H118 83707849
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