sqlite

A Single Label can display 2 Data fields alternately select by user

由 倾然丶 夕夏残阳落幕 提交于 2020-12-15 06:18:18
问题 I'm trying to use a single Label to display one of the two data fields alternately in Xamarin Forms. Only Label 1 Display the binding field and second Label which I am trying to use a variable "DisplayField" is not displaying either 'Contact_Address' or 'Contact_eMail' Model class public class Contacts { [PrimaryKey][Autoincrement] public int Contact_ID { get; set; } public string Contact_Name { get; set; } public string Contact_Address { get; set; } public string Contact_eMail { get; set; }

Can't get data from date to date SQLite

由 99封情书 提交于 2020-12-15 05:32:45
问题 I have an SQLite database in android and I want to Select From a table "Transactions" only data from date1 till date2. Code: SELECT * FROM Transactions WHERE DATE(substr(transactiondate,7,4) ||substr(transactiondate,4,2) ||substr(transactiondate,1,2)) BETWEEN DATE(20201030) AND DATE(20201031) Here is the database data result of query: Execution finished without errors. Result: 0 rows returned in 13ms Update: Here is how I changed my data to "year-month-day" format: val c = Calendar

Can't get data from date to date SQLite

由 余生长醉 提交于 2020-12-15 05:32:35
问题 I have an SQLite database in android and I want to Select From a table "Transactions" only data from date1 till date2. Code: SELECT * FROM Transactions WHERE DATE(substr(transactiondate,7,4) ||substr(transactiondate,4,2) ||substr(transactiondate,1,2)) BETWEEN DATE(20201030) AND DATE(20201031) Here is the database data result of query: Execution finished without errors. Result: 0 rows returned in 13ms Update: Here is how I changed my data to "year-month-day" format: val c = Calendar

Flutter - Group date wise and show under a sticky header

由 六月ゝ 毕业季﹏ 提交于 2020-12-15 05:22:07
问题 I want to group all list tiles according dates which are same and show them under sticky bar as shown in the picture. I get the dates from sqlite database. The data from the database is in format like this: 21-01-2020. It should show Today, tomorrow and date for example 28 Nov 2020 as in the picture. ListView.builder( ... return listTile( title: Text(items[position0].dates), //dates from database, returns 21-01-2020 ), ), At last I just want results like the below picture by comparing dates

flutter sqlite transaction usage error warning database has been locked for

由 不想你离开。 提交于 2020-12-15 05:19:49
问题 I am developing a mobile application that use sqlite and transaction. Below code is that getting order information from user using by using sqlite transaction saving model to multiple db tables. Future<AppResult<int>> save(Order order) async { Database db; var dbReturn = BaseService(); try { db = await databaseOpen(); int dbSaveResult = 0; await db.transaction((txn) async { var batch = txn.batch(); final List<Map<String, dynamic>> exist = await db.query(tableName, where: "id =?", whereArgs:

Can't insert the record to database C# SQLite

由 |▌冷眼眸甩不掉的悲伤 提交于 2020-12-15 03:40:59
问题 I've been struggling with an error related to the database. Basically I have an SQLite db and I want to insert the data, but after I execute the method, no data is written to the db but no errors are shown either. This is my code: The db connection class: class SqlDb { public static SQLiteConnection SqLiteConnection; public static string DATABASE_WAREHOUSE = "DaneDB.db"; public static string DATABASE_LACZKA = $"Data Source= {DATABASE_WAREHOUSE};Version=3;New=False;Compress=True;"; public

Can't insert the record to database C# SQLite

由 旧巷老猫 提交于 2020-12-15 03:37:26
问题 I've been struggling with an error related to the database. Basically I have an SQLite db and I want to insert the data, but after I execute the method, no data is written to the db but no errors are shown either. This is my code: The db connection class: class SqlDb { public static SQLiteConnection SqLiteConnection; public static string DATABASE_WAREHOUSE = "DaneDB.db"; public static string DATABASE_LACZKA = $"Data Source= {DATABASE_WAREHOUSE};Version=3;New=False;Compress=True;"; public

小技巧（八） 误删除sqlite 导致yum、rpm工具不可用

由 雨燕双飞 提交于 2020-12-14 10:32:53
昨天准备安装python3，有一些前置依赖的版本冲突了 当时一抽筋了，删除了sqlite这个rpm包，导致rpm、yum工具都不能用了{ { {(>_<)}}} [root@k8s-master01 ~]# rpm -qa sqlite sqlite-3.7.17-8.el7.x86_64 模拟误删除 rpm -e sqlite --nodeps 然后完犊子了 [root@k8s-master01 ~]# rpm -qa sqlite 错误：Failed to initialize NSS library [root@k8s-master01 ~]# yum list error: Failed to initialize NSS library There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: cannot import name ts Please install a package which provides this module, or verify that the module is installed correctly. It's possible that the above

想进BAT一线互联网大厂，该怎么准备技术面试？一位6年老Android的面经总结（附300+面试题）

由 倖福魔咒の 提交于 2020-12-14 10:09:31
前言 准备面试其实已经准备了挺久了，当时打算面试准备了差不多以后，跟公司谈谈涨薪的事情，谈不拢的话，就年后直接找其他的公司。谁想到婚假还没休完，老板就在公司宣布了撤出上海的决定，愿意去深圳的就去，不愿意的就自己找工作，给了一个多月的时间找工作，就没有赔偿了，反正公司也没钱。悲哀…. 幸好提前准备过,不过都是断断续续的今天看点这个，明天看点那个，三天打鱼两天晒网的，也没用心去准备。这下好了，直接到了最差的地步了，没办法，用心准备吧。 简历内容 基本信息 姓名，联系方式，工作年限，学校，专业，学历 个人技能 工作几年 独立开发 掌握的技能，组件化、插件化、热修复、自定义view 适配、架构、第三方源码、性能优化 职业技能：管理能力、产品能力、沟通能力 这些东西一定要写自己熟悉的，最好项目里面能体现出来的内容 项目经验 项目描述： 一句话 工作内容：做了哪些模块，用了什么技术、做过哪些优化，重构方面的内容 项目方面写两到三个项目，最好最近一两家公司做的项目 公司经历 公司名称 时间 工作内容 面试题准备 项目中用到的技术 整理出来，上网找找相关的技术文章和面试题看看，然后用自己的话把这些内容梳理出来，最好有自己的看到，面试官习惯问为什么。 Android知识点 基础： 四大组件、fragment、自定义View、事件分发、滑动处理、handler、AsyncTask

SQLite starting rowid of 0

由 ≯℡__Kan透↙ 提交于 2020-12-13 10:35:53
问题 I'm trying to set up a SQLite table where the rowid starts from 0 instead of the default 1. The end goal is to be able to run the first INSERT statement and have it insert to rowid 0. Explicitly setting rowid to 0 for that first INSERT is not an option. I've tried a few things related to AUTOINCREMENT but am not having any luck getting this to work cleanly. The only successful way I've found is to insert a row with rowid of -1 and then delete it later. This works but it's messy and I'd like
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