/// /// <value>The date time string format.</value> public string DateTimeStringFormat { get; private set; } /// /// The DateTimeStyles value to use when parsing a DateTime property string. /// /// <value>The date time style.</value> internal System.Globalization.DateTimeStyles ...
>>> KV.update(value=KV.value['k1'].set('v1')).execute() 1 >>> KV.get(KV.key == 'a').value {'k1': 'v1', 'k2': 'v2'} The set() method can also be used with objects, in addition to scalar values:>>> KV.update(value=KV.value['k2'].set({'x2': 'y2'}))....
这里要额外说明一下,SQLite采用的是动态数据类型,这一点与其他类型的数据库不同,其他类型的数据库是在定义字段时设定了字段的数据类型,以后该字段只能存放设定类型的数据,而SQLite则不然,比如定义了一个INTEGER类型的字段col1,也可以正常地往该字段存放一串字符串:”ABCDEFGI…..”。不过若要考虑到要把库转移到别...
//创建一个表,如果该表存在,则不创建,并给出提示信息,存储在 zErrMsg 中 char *sql = " CREATE TABLE SensorData( ID INTEGER PRIMARY KEY, SensorID INTEGER, SiteNum INTEGER, Time VARCHAR(12), SensorParameter REAL );" ; sqlite3_exec( db , sql , 0 , 0 , &zErrMsg ); #ifdef _DEBUG_ p...
System.ArgumentNullException: Value cannot be null. Parameter name: stream System.DllNotFoundException: '__Internal assembly:<unknown assembly> type:<unknown type> System.FormatException: One of the identified items was in an invalid format. System.InvalidCastException: Object must implement IConvertibl...
首选项错误码:code:"401” err: Error: Parameter error. The type of 'value' must be ValueType. 如何排查问题 如何查看或导出持久化数据? 如何获知数据存储沙箱路径? 插入数据之后,RDB数据库的wal文件体积异常 用户首选项是线程安全的吗 为什么在关系型数据库中调用deleteRdbStore函数后并未真实删除数据...
so the database pathname is made of the filename (CustomersDb.db3) and the Personal folder path. The resulting pathname is assigned as a parameter to the constructor of the SQLiteConnection class and returned to the caller. On iOS, you use the same API, but the folder in which the SQLi...
sqlite3_exec(), 运行非查询的sql语句 sqlite3_prepare(), 准备sql语句,运行select语句或者要使用parameter bind时,用这个函数(封装了sqlite3_exec). Sqlite3_step(), 在调用sqlite3_prepare后,使用这个函数在记录集中移动。 Sqlite3_close(), 关闭数据库文件 ...
The db version, display name, and size parameter values are not supported and will be ignored. (No longer supported by the API) Absolute and relative subdirectory path(s) are not tested or supported. This plugin will not work before the callback for the 'deviceready' event has been fired,...
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