在SQLite 中,可以使用内置的日期和时间函数将字符串转换为日期。常用的函数包括datetime(),date(), 和time()。 示例代码 假设我们有一个表events,其中有一个列event_time存储为字符串: 代码语言:txt 复制 CREATE TABLE events ( id INTEGER PRIMARY KEY, event_name TEXT, event_time TEXT ); ...
行27: info.Regip = reader["regip"].ToString(); 行28: info.Regdate = Convert.ToDateTime(reader["regdate"]).ToString("yyyy-MM-dd"); 堆栈跟踪: [FormatException: 该字符串未被识别为有效的 DateTime。] System.DateTimeParse.ParseExactMultiple(String s, String[] formats, DateTimeFormatInfo dtfi...
privatevoidbutton1_Click(objectsender, EventArgs e){;stringname =this.textBox1.Text.ToString();stringpassword =this.textBox2.Text.ToString();//参数化查询stringsql =string.Format("insert into UserInfo(UserId,UserNames,UserPasss,RegDate) values(@userid,@username,@passwod,datetime('now','localt...
Using SQLite, you can freely choose any data types to store date and time values and use the built-in dates and times function to convert between formats. 你可以任意选择数据类型来存储日期和时间,并使用内置的日期和时间函数来转换格式。 For the detailed information on SQLite dates and times functi...
string sql="insert into [table] (date_time) values('" + date_time.ToString() + "'"; 执行如上命令.插入没有报告错误. 但是,我又用一条命令读取时: string sql="select * from [table]; ... IDataReader dr=cmd.ExecuteReader(); ..
QDateTime temp = query.value(i).toDateTime(); rowData[rec.fieldName(i)]=temp.toString("yyyy-MM-dd hh:mm:ss"); } else rowData[rec.fieldName(i)]=query.value(i).toString(); } data.append(rowData); } return true;}//获取数据bool sqliteDb::getData(QString dbName,QString tableName...
(QString dirPath);//设置数据库存放路径 bool creatDbFile(QString dbName);//生成一个db文件 bool reOpenSql(QString dbName);//打开连接 bool closeSql();//关闭连接 bool queryExec(QString dbName,QString sqlStr);//执行sql语句,不获取结果 bool queryExec(QString dbName,QString sqlStr,QList<Q...
Using SQLite, you can freely choose any data types to store date and time values and use the built-in dates and times function to convert between formats.你可以任意选择数据类型来存储日期和时间,并使用内置的日期和时间函数来转换格式。For the detailed information on SQLite dates and ...
DATEADD(date_string, amount, 'unit') Adds a time interval to a date or datetme DATESUB(date_string, amount, 'unit') Subtracts a time interval from a date or datetime DATEDIFF(date_string1, date_string2, 'unit') Calculates the difference in the specified units between two dates or date...
根据官⽹⽂档)import sqlite3 import datetime # 适配器 def adapt_date(date):return datetime.datetime.strftime('%Y/%m/%d', date)#return date.strftime('%Y/%m/%d').encode('ascii')#return date.strftime('%Y/%m/%d').encode()# 转换器 def convert_date(string):