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    time()

    的搜索结果

问题

计时器里面的参数time为什么停留在初始值?

js代码如下:(function() { $.fn.countDown = function(userOptions) { var defaultOptions = {...
小旋风柴进 2019-12-01 19:33:32 808 浏览量 回答数 1

问题

全局事务服务 GTS 函数怎么运行?

下表列出了 DQL 语句和 DML 语句对函数的支持情况,需要注意的是,在 DML 语句中使用函数,不能将其作为主键。 DML 语句支持 类型是否支持CONCAT(string2[,…])是...
猫饭先生 2019-12-01 21:25:08 991 浏览量 回答数 0

问题

连续两个窗口,第二个窗口一直无法被触发,单独跑第一个窗口没有问题,其实就是想模拟一个当天的topN

val stream: DataStream[PageView] = env.addSource(new PVSource()).map(node => { Event(node._1, node.2.toString...
1797940624159998 2019-12-01 19:47:30 9 浏览量 回答数 0

回答

四种方式 //Promise const sleep = time => { return new Promise(resolve => setTimeout(resolve,time)) } sleep(1000).then(()=>{ console.log(1) }) //Generator function* sleepGenerator(time) { yield new Promise(function(resolve,reject){ setTimeout(resolve,time); }) } sleepGenerator(1000).next().value.then(()=>{console.log(1)}) //async function sleep(time) { return new Promise(resolve => setTimeout(resolve,time)) } async function output() { let out = await sleep(1000); console.log(1); return out; } output(); //ES5 function sleep(callback,time) { if(typeof callback === 'function') setTimeout(callback,time) } function output(){ console.log(1); } sleep(output,1000);
九旬 2020-05-24 11:48:51 0 浏览量 回答数 0

回答

public class MainActivity extends Activity { public TextView time_text; public Handler mHandler=new Handler(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); time_text=(TextView)findViewById(R.id.time_text); time_text.setText(getLocalDatetimeString("GMT+8")); time_text.setTextColor(Color.WHITE); time_text.setText(" " + getLocalDatetimeString("GMT+8"));//显示时间 } public static String getLocalDatetimeString(String local) { Calendar cal = new GregorianCalendar(TimeZone.getTimeZone(local)); cal.setTimeInMillis(Calendar.getInstance().getTimeInMillis()); String date = cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" + cal.get(Calendar.DAY_OF_MONTH); String time = cal.get(Calendar.HOUR_OF_DAY) + ":" + cal.get(Calendar.MINUTE) + ":" + cal.get(Calendar.SECOND); return date + " " + time; } } 这样就能显示当前时间了。
爵霸 2019-12-02 02:45:58 0 浏览量 回答数 0

回答

-- coding: utf-8 --@Time : 18-9-14 下午12:47@Author : Felix Wangfrom turtle import *import timesetup(600, 800, 0, 0)speed(0)penup()seth(90)fd(340)seth(0)pendown()speed(5)begin_fill()fillcolor('red')circle(50, 30)for i in range(10):fd(1) left(10)circle(40, 40)for i in range(6):fd(1) left(3)circle(80, 40)for i in range(20):fd(0.5) left(5)circle(80, 45)for i in range(10):fd(2) left(1)circle(80, 25)for i in range(20):fd(1) left(4)circle(50, 50)time.sleep(0.1)circle(120, 55)speed(0)seth(-90)fd(70)right(150)fd(20)left(140)circle(140, 90)left(30)circle(160, 100)left(130)fd(25)penup()right(150)circle(40, 80)pendown()left(115)fd(60)penup()left(180)fd(60)pendown()end_fill()right(120)circle(-50, 50)circle(-20, 90)speed(1)fd(75)speed(0)circle(90, 110)penup()left(162)fd(185)left(170)pendown()circle(200, 10)circle(100, 40)circle(-52, 115)left(20)circle(100, 20)circle(300, 20)speed(1)fd(250)penup()speed(0)left(180)fd(250)circle(-300, 7)right(80)circle(200, 5)pendown()left(60)begin_fill()fillcolor('green')circle(-80, 100)right(90)fd(10)left(20)circle(-63, 127)end_fill()penup()left(50)fd(20)left(180)pendown()circle(200, 25)penup()right(150)fd(180)right(40)pendown()begin_fill()fillcolor('green')circle(-100, 80)right(150)fd(10)left(60)circle(-80, 98)end_fill()penup()left(60)fd(13)left(180)pendown()speed(1)circle(-200, 23)exitonclick()
寒喵 2019-12-02 01:09:10 0 浏览量 回答数 0

回答

-- coding: utf-8 --@Time : 18-9-14 下午12:47@Author : Felix Wangfrom turtle import *import timesetup(600, 800, 0, 0)speed(0)penup()seth(90)fd(340)seth(0)pendown()speed(5)begin_fill()fillcolor('red')circle(50, 30)for i in range(10):fd(1) left(10)circle(40, 40)for i in range(6):fd(1) left(3)circle(80, 40)for i in range(20):fd(0.5) left(5)circle(80, 45)for i in range(10):fd(2) left(1)circle(80, 25)for i in range(20):fd(1) left(4)circle(50, 50)time.sleep(0.1)circle(120, 55)speed(0)seth(-90)fd(70)right(150)fd(20)left(140)circle(140, 90)left(30)circle(160, 100)left(130)fd(25)penup()right(150)circle(40, 80)pendown()left(115)fd(60)penup()left(180)fd(60)pendown()end_fill()right(120)circle(-50, 50)circle(-20, 90)speed(1)fd(75)speed(0)circle(90, 110)penup()left(162)fd(185)left(170)pendown()circle(200, 10)circle(100, 40)circle(-52, 115)left(20)circle(100, 20)circle(300, 20)speed(1)fd(250)penup()speed(0)left(180)fd(250)circle(-300, 7)right(80)circle(200, 5)pendown()left(60)begin_fill()fillcolor('green')circle(-80, 100)right(90)fd(10)left(20)circle(-63, 127)end_fill()penup()left(50)fd(20)left(180)pendown()circle(200, 25)penup()right(150)fd(180)right(40)pendown()begin_fill()fillcolor('green')circle(-100, 80)right(150)fd(10)left(60)circle(-80, 98)end_fill()penup()left(60)fd(13)left(180)pendown()speed(1)circle(-200, 23)exitonclick()
asdasdasd222 2019-12-02 01:08:58 0 浏览量 回答数 0

问题

SWIFT 如何解析 JSON数组

[{"Date(time)":"2015-12-01","DayOfWeek(time)":"3","Time(time)":"11:38:23","Hour(time)":"11"}, {"Date(time)":"2015-12-02...
杨冬芳 2019-12-01 20:18:42 1085 浏览量 回答数 1

问题

android listView 删除动画 当前Item 删了,但是动画总是从最后一行执行

点击ListView 的item中的控件,删除当前item时,想让它一动画的方式 消失,但是,点击删除时,item可以删除掉,但是动画总是执行的最后一行 求解、??这是主要代码@Override public View getView(f...
爵霸 2019-12-01 20:05:02 1333 浏览量 回答数 0

问题

android listView 删除动画 当前Item 删了,但是为什么动画总是从最后一行执行 ?

点击ListView 的item中的控件,删除当前item时,想让它一动画的方式 消失,但是,点击删除时,item可以删除掉,但是动画总是执行的最后一行 求解、??这是主要代码@Override public View getView(f...
爵霸 2019-12-01 20:05:02 1389 浏览量 回答数 0

问题

如何以精美的方式擦除打印的文字?

我想创建使文本写入并擦除自身。我已经找到了如何使它每次写入每个字符,但是我还没有找到如何以相同的方式擦除它(从第一个字母到最后一个字母) import time import os import ...
is大龙 2020-03-24 08:56:02 1 浏览量 回答数 1

问题

如何在pygame中以正确的方式使用blit()?

我试图制作一个纹理游戏,但是它没有错误。我将显示代码。 import time import pygame from pygame.locals import \* def Main(): pygam...
is大龙 2020-03-24 19:01:01 1 浏览量 回答数 1

问题

当水印小于窗口结束时,触发基于事件时间的Flink窗口操作

我在Flink测试事件时间和水印。以下是我的代码。 object WatermarkTest { def main(args: Array[String]): Unit = { val env = StreamExecution...
社区小助手 2019-12-01 19:25:23 885 浏览量 回答数 1

问题

Java秒表GUI程序符合但无法运行

我有一个任务,我必须创建一个GUI秒表程序,该程序必须具有计时器的启动,停止和重置按钮。 到目前为止,我有一个可以正确编译的程序,但是当我去运行该程序时会在下面产生错误...
montos 2020-03-25 21:39:19 1 浏览量 回答数 1

回答

df.groupBy("groupCol").agg(max("value")-min("value"))基于OP编辑的问题,这里有一种在PySpark中执行此操作的方法。这个想法是按每组的时间的升序和降序计算行号,并使用这些值进行减法。from pyspark.sql import Windowfrom pyspark.sql import functions as funcw_asc = Window.partitionBy(df.groupCol).orderBy(df.time)w_desc = Window.partitionBy(df.groupCol).orderBy(func.desc(df.time))df = df.withColumn(func.row_number().over(w_asc).alias('rnum_asc')) \ .withColumn(func.row_number().over(w_desc).alias('rnum_desc'))df.groupBy(df.groupCol) \ .agg((func.max(func.when(df.rnum_desc==1,df.value))-func.max(func.when(df.rnum_asc==1,df.value))).alias('diff')).show()如果first_valueSpark SQL中有窗口函数,那会更容易。使用SQL解决此问题的一般方法是select distinct groupCol,difffrom (select t.* ,first_value(val) over(partition by groupCol order by time) - first_value(val) over(partition by groupCol order by time desc) as difffrom tbl t) t
社区小助手 2019-12-02 01:51:15 0 浏览量 回答数 0

回答

settings = get_wrapper_input_json("Szenarioanalyse.json") #get the settingsparameters = {"Threads":True,"Processes":False,"Serial":False} def simulate(setting): cfg_path = generate(settings[setting]) run_simulation(cfg_path) if name == '__main__': for key,value in parameters.items(): if key == "Threads" and value == True: start_threads = time.perf_counter() with futures.ThreadPoolExecutor(10) as e: e.map(simulate,settings) print("Simulationtime "+key+": "+str(time.perf_counter()-start_threads)) elif key == "Processes" and value == True: start_processes = time.perf_counter() pool = multiprocessing.Pool(multiprocessing.cpu_count()) pool.map(simulate,settings) print("Simulationtime "+key+": "+str(time.perf_counter()-start_processes)) elif key == "Serial" and value == True: start_serial = time.perf_counter() for setting in settings: simulate(setting) print("Simulationtime "+key+": "+str(time.perf_counter()-start_serial)) #save_dataframe("Szenarioanalyse.json") #file_management()
一码平川MACHEL 2019-12-02 01:54:25 0 浏览量 回答数 0

问题

HybridDB for MySQL中支持的MySQL函数有什么

HybridDB for MySQL目前支持在SELECT查询语句中使用如下的SQL函数: 注:1.若无特殊说明,以下函数均为 MySQL v5.6中的函数定义) 注:2...
云栖大讲堂 2019-12-01 21:27:41 1433 浏览量 回答数 0

问题

C语言 如何在宏定义中使用可变参数

有一个记录日志的函数,想用宏定义进行包装,简化调用方法,但是xlc报如下的错误: void _log(const int level, char* file, int line, const char* fmt, ...){ va_...
a123456678 2019-12-01 19:43:24 1151 浏览量 回答数 1

回答

高阶版本 from turtle import * import random import time n = 80.0 speed("fastest") screensize(bg='seashell') left(90) forward(3*n) color("orange", "yellow") begin_fill() left(126) for i in range(5): forward(n/5) right(144) forward(n/5) left(72) end_fill() right(126) color("dark green") backward(n*4.8) def tree(d, s): if d <= 0: return forward(s) tree(d-1, s*.8) right(120) tree(d-3, s*.5) right(120) tree(d-3, s*.5) right(120) backward(s) tree(15, n) backward(n/2) for i in range(200): a = 200 - 400 * random.random() b = 10 - 20 * random.random() up() forward(b) left(90) forward(a) down() if random.randint(0, 1) == 0: color('tomato') else: color('wheat') circle(2) up() backward(a) right(90) backward(b) time.sleep(60)
游客pklijor6gytpx 2019-12-23 14:45:29 0 浏览量 回答数 0

问题

程序开始运行时强制关闭,Adapter方法出错(用来实现闹钟的时间列表)

package pcAlarm.pack; import java.util.Calendar; import java.util.Currency; import pcAlarm.pack.PCAlarmActivity; imp...
爵霸 2019-12-01 20:01:30 1084 浏览量 回答数 0

回答

加上left join拼接呢select a. ,b. from(SELECT YEAR(r.send_time) y,MONTH(r.send_time) m,DAY(r.send_time) d,HOUR(r.send_time) h,max(r.driving_range)-min(r.driving_range) r,avg(r.avg_oil_a) oFROM realtime r GROUP BY DATE_FORMAT(r.sending_time,'%Y-%m-%d %H')) AS aLEFT JOIN(SELECT YEAR(g.send_time) y,MONTH(g.send_time) m,DAY(g.send_time) d,HOUR(g.send_time) h,max(g.speed) ms,avg(g.speed) avsFROM gps g GROUP BY DATE_FORMAT(g.sending_time,'%Y-%m-%d %H') ) AS bon a.y = b.y and a.m= b.m and a.h=b.h and a.d=b.d
吴孟桥 2019-12-02 02:49:28 0 浏览量 回答数 0

问题

Android Java:将else-if转换为switch

我使用else-if语句检查布尔值,由于使用else-if,这会导致性能下降。 基于这个原因,我正在考虑将else-if语句转换为switch语句,以便我希望听到您的建议࿰...
七天一失眠 2020-04-09 11:21:16 1 浏览量 回答数 1

回答

AACCESSIBLE (R)ACTIONADD (R)AFTERAGAINSTAGGREGATEALGORITHMALL (R)ALTER (R)ANALYZE (R)AND (R)ANYAS (R)ASC (R)ASCIIASENSITIVE (R)ATAUTHORSAUTOEXTEND_SIZEAUTO_INCREMENTAVGAVG_ROW_LENGTHBBACKUPBEFORE (R)BEGINBETWEEN (R)BIGINT (R)BINARY (R)BINLOGBITBLOB (R)BLOCKBOOLBOOLEANBOTH (R)BTREEBY (R)BYTECCACHECALL (R)CASCADE (R)CASCADEDCASE (R)CATALOG_NAMECHAINCHANGE (R)CHANGEDCHAR (R)CHARACTER (R)CHARSETCHECK (R)CHECKSUMCIPHERCLASS_ORIGINCLIENTCLOSECOALESCECODECOLLATE (R)COLLATIONCOLUMN (R)COLUMNSCOLUMN_NAMECOMMENTCOMMITCOMMITTEDCOMPACTCOMPLETIONCOMPRESSEDCONCURRENTCONDITION (R)CONNECTIONCONSISTENTCONSTRAINT (R)CONSTRAINT_CATALOGCONSTRAINT_NAMECONSTRAINT_SCHEMACONTAINSCONTEXTCONTINUE (R)CONTRIBUTORSCONVERT (R)CPUCREATE (R)CROSS (R)CUBECURRENT_DATE (R)CURRENT_TIME (R)CURRENT_TIMESTAMP (R)CURRENT_USER (R)CURSOR (R)CURSOR_NAMEDDATADATABASE (R)DATABASES (R)DATAFILEDATEDATETIMEDAYDAY_HOUR (R)DAY_MICROSECOND (R)DAY_MINUTE (R)DAY_SECOND (R)DEALLOCATEDEC (R)DECIMAL (R)DECLARE (R)DEFAULT (R)DEFINERDELAYED (R)DELAY_KEY_WRITEDELETE (R)DESC (R)DESCRIBE (R)DES_KEY_FILEDETERMINISTIC (R)DIRECTORYDISABLEDISCARDDISKDISTINCT (R)DISTINCTROW (R)DIV (R)DODOUBLE (R)DROP (R)DUAL (R)DUMPFILEDUPLICATEDYNAMICEEACH (R)ELSE (R)ELSEIF (R)ENABLEENCLOSED (R)ENDENDSENGINEENGINESENUMERROR added in 5.5.3 (nonreserved)ERRORSESCAPEESCAPED (R)EVENTEVENTSEVERYEXECUTEEXISTS (R)EXIT (R)EXPANSIONEXPLAIN (R)EXTENDEDEXTENT_SIZEFFALSE (R)FASTFAULTSFETCH (R)FIELDSFILEFIRSTFIXEDFLOAT (R)FLOAT4 (R)FLOAT8 (R)FLUSHFOR (R)FORCE (R)FOREIGN (R)FOUNDFRAC_SECOND removed in 5.5.3FROM (R)FULLFULLTEXT (R)FUNCTIONGGENERAL added in 5.5.3 (reserved); became nonreserved in 5.5.8GEOMETRYGEOMETRYCOLLECTIONGET_FORMATGLOBALGRANT (R)GRANTSGROUP (R)HHANDLERHASHHAVING (R)HELPHIGH_PRIORITY (R)HOSTHOSTSHOURHOUR_MICROSECOND (R)HOUR_MINUTE (R)HOUR_SECOND (R)IIDENTIFIEDIF (R)IGNORE (R)IGNORE_SERVER_IDS became nonreserved in 5.5.8IMPORTIN (R)INDEX (R)INDEXESINFILE (R)INITIAL_SIZEINNER (R)INNOBASE removed in 5.5.3INNODB removed in 5.5.3INOUT (R)INSENSITIVE (R)INSERT (R)INSERT_METHODINSTALLINT (R)INT1 (R)INT2 (R)INT3 (R)INT4 (R)INT8 (R)INTEGER (R)INTERVAL (R)INTO (R)INVOKERIOIO_THREADIPCIS (R)ISOLATIONISSUERITERATE (R)JJOIN (R)KKEY (R)KEYS (R)KEY_BLOCK_SIZEKILL (R)LLANGUAGELASTLEADING (R)LEAVE (R)LEAVESLEFT (R)LESSLEVELLIKE (R)LIMIT (R)LINEAR (R)LINES (R)LINESTRINGLISTLOAD (R)LOCALLOCALTIME (R)LOCALTIMESTAMP (R)LOCK (R)LOCKSLOGFILELOGSLONG (R)LONGBLOB (R)LONGTEXT (R)LOOP (R)LOW_PRIORITY (R)MMASTERMASTER_CONNECT_RETRYMASTER_HEARTBEAT_PERIOD became nonreserved in 5.5.8MASTER_HOSTMASTER_LOG_FILEMASTER_LOG_POSMASTER_PASSWORDMASTER_PORTMASTER_SERVER_IDMASTER_SSLMASTER_SSL_CAMASTER_SSL_CAPATHMASTER_SSL_CERTMASTER_SSL_CIPHERMASTER_SSL_KEYMASTER_SSL_VERIFY_SERVER_CERT (R)MASTER_USERMATCH (R)MAXVALUE (R)MAX_CONNECTIONS_PER_HOURMAX_QUERIES_PER_HOURMAX_ROWSMAX_SIZEMAX_UPDATES_PER_HOURMAX_USER_CONNECTIONSMEDIUMMEDIUMBLOB (R)MEDIUMINT (R)MEDIUMTEXT (R)MEMORYMERGEMESSAGE_TEXTMICROSECONDMIDDLEINT (R)MIGRATEMINUTEMINUTE_MICROSECOND (R)MINUTE_SECOND (R)MIN_ROWSMOD (R)MODEMODIFIES (R)MODIFYMONTHMULTILINESTRINGMULTIPOINTMULTIPOLYGONMUTEXMYSQL_ERRNONNAMENAMESNATIONALNATURAL (R)NCHARNDBNDBCLUSTERNEWNEXTNONODEGROUPNONENOT (R)NO_WAITNO_WRITE_TO_BINLOG (R)NULL (R)NUMERIC (R)NVARCHAROOFFSETOLD_PASSWORDON (R)ONEONE_SHOTOPENOPTIMIZE (R)OPTION (R)OPTIONALLY (R)OPTIONSOR (R)ORDER (R)OUT (R)OUTER (R)OUTFILE (R)OWNERPPACK_KEYSPAGEPARSERPARTIALPARTITIONPARTITIONINGPARTITIONSPASSWORDPHASEPLUGINPLUGINSPOINTPOLYGONPORTPRECISION (R)PREPAREPRESERVEPREVPRIMARY (R)PRIVILEGESPROCEDURE (R)PROCESSLISTPROFILEPROFILESPROXY added in 5.5.7 (nonreserved)PURGE (R)QQUARTERQUERYQUICKRRANGE (R)READ (R)READS (R)READ_ONLYREAD_WRITE (R)REAL (R)REBUILDRECOVERREDOFILEREDO_BUFFER_SIZEREDUNDANTREFERENCES (R)REGEXP (R)RELAY added in 5.5.3 (nonreserved)RELAYLOGRELAY_LOG_FILERELAY_LOG_POSRELAY_THREADRELEASE (R)RELOADREMOVERENAME (R)REORGANIZEREPAIRREPEAT (R)REPEATABLEREPLACE (R)REPLICATIONREQUIRE (R)RESETRESIGNAL (R)RESTORERESTRICT (R)RESUMERETURN (R)RETURNSREVOKE (R)RIGHT (R)RLIKE (R)ROLLBACKROLLUPROUTINEROWROWSROW_FORMATRTREESSAVEPOINTSCHEDULESCHEMA (R)SCHEMAS (R)SCHEMA_NAMESECONDSECOND_MICROSECOND (R)SECURITYSELECT (R)SENSITIVE (R)SEPARATOR (R)SERIALSERIALIZABLESERVERSESSIONSET (R)SHARESHOW (R)SHUTDOWNSIGNAL (R)SIGNEDSIMPLESLAVESLOW added in 5.5.3 (reserved); became nonreserved in 5.5.8SMALLINT (R)SNAPSHOTSOCKETSOMESONAMESOUNDSSOURCESPATIAL (R)SPECIFIC (R)SQL (R)SQLEXCEPTION (R)SQLSTATE (R)SQLWARNING (R)SQL_BIG_RESULT (R)SQL_BUFFER_RESULTSQL_CACHESQL_CALC_FOUND_ROWS (R)SQL_NO_CACHESQL_SMALL_RESULT (R)SQL_THREADSQL_TSI_DAYSQL_TSI_FRAC_SECOND removed in 5.5.3SQL_TSI_HOURSQL_TSI_MINUTESQL_TSI_MONTHSQL_TSI_QUARTERSQL_TSI_SECONDSQL_TSI_WEEKSQL_TSI_YEARSSL (R)STARTSTARTING (R)STARTSSTATUSSTOPSTORAGESTRAIGHT_JOIN (R)STRINGSUBCLASS_ORIGINSUBJECTSUBPARTITIONSUBPARTITIONSSUPERSUSPENDSWAPSSWITCHESTTABLE (R)TABLESTABLESPACETABLE_CHECKSUMTABLE_NAMETEMPORARYTEMPTABLETERMINATED (R)TEXTTHANTHEN (R)TIMETIMESTAMPTIMESTAMPADDTIMESTAMPDIFFTINYBLOB (R)TINYINT (R)TINYTEXT (R)TO (R)TRAILING (R)TRANSACTIONTRIGGER (R)TRIGGERSTRUE (R)TRUNCATETYPETYPESUUNCOMMITTEDUNDEFINEDUNDO (R)UNDOFILEUNDO_BUFFER_SIZEUNICODEUNINSTALLUNION (R)UNIQUE (R)UNKNOWNUNLOCK (R)UNSIGNED (R)UNTILUPDATE (R)UPGRADEUSAGE (R)USE (R)USERUSER_RESOURCESUSE_FRMUSING (R)UTC_DATE (R)UTC_TIME (R)UTC_TIMESTAMP (R)VVALUEVALUES (R)VARBINARY (R)VARCHAR (R)VARCHARACTER (R)VARIABLESVARYING (R)VIEWWWAITWARNINGSWEEKWHEN (R)WHERE (R)WHILE (R)WITH (R)WORKWRAPPERWRITE (R)XX509XAXMLXOR (R)YYEARYEAR_MONTH (R)ZZEROFILL (R)MySQL 5.5 New Keywords and Reserved WordsThe following list shows the keywords and reserved words that are added in MySQL 5.5, compared to MySQL 5.1. Reserved keywords are marked with (R).CCATALOG_NAMECLASS_ORIGINCOLUMN_NAMECONSTRAINT_CATALOGCONSTRAINT_NAMECONSTRAINT_SCHEMACURSOR_NAMEEERRORGGENERALIIGNORE_SERVER_IDSMMASTER_HEARTBEAT_PERIODMESSAGE_TEXTMYSQL_ERRNOPPROXYRRELAYRELAYLOGRESIGNAL (R)SSCHEMA_NAMESIGNAL (R)SLOWSUBCLASS_ORIGINTTABLE_NAMEXXMLMySQL 5.5 Removed Keywords and Reserved WordsThe following list shows the keywords and reserved words that are removed in MySQL 5.5, compared to MySQL 5.1. Reserved keywords are marked with (R).FRAC_SECONDINNOBASEINNODBSQL_TSI_FRAC_SECOND原文:https://blog.csdn.net/u011479200/article/details/78664625
努力增长 2019-12-02 01:55:24 0 浏览量 回答数 0

问题

java怎么调用MySQL存储过程?

Java调用存储过程报错,存储过程有两个int型参数,在数据库里存储过程可以运行,运行结果如上图:java.sql.SQLException: Parameter index out of range (0 < 1 ).代码如下,不知...
蛮大人123 2019-12-01 19:57:40 1850 浏览量 回答数 1

问题

listview 用baseadapter报空指针?报错

报错如下 代码如下 public class ChatActivity extends Activity { private int myaccount; private int chat_account; ...
爱吃鱼的程序员 2020-06-20 17:03:15 0 浏览量 回答数 1

问题

SQL 兼容性怎么样?

[font=PingFangSC, "]DRDS 高度兼容 MySQL 协议和语法,但由于分布式数据库和单机数据库存在较大的架构差异,存在 SQL 使用限制。相关兼容性和 SQL 限制描述如下。 ...
猫饭先生 2019-12-01 21:19:24 905 浏览量 回答数 0

问题

我的比较器方法

第三方引用 import java.util.Collections; import java.util.Comparator; import org.joda.time.DateTime; 我的比较器 public static ...
montos 2020-03-27 10:11:27 1 浏览量 回答数 1

问题

我如何在getArrow()的if(ab)中本地更改x和y的值

public class Arrow { protected static int x; protected static int y; public void setA(boolean a) { this.a = a...
montos 2020-03-24 14:20:26 0 浏览量 回答数 1

回答

您需要将列转换为时间戳,然后执行diff计算。看一下这个: scala> val df = Seq(("1/01/2017 12:01:00 AM","1/1/2017 12:05:00 AM")).toDF("time1","time2")df: org.apache.spark.sql.DataFrame = [time1: string, time2: string] scala> val df2 = df.withColumn("time1",to_timestamp('time1,"d/MM/yyyy hh:mm:ss a")).withColumn("time2",to_timestamp('time2,"d/MM/yyyy hh:mm:ss a"))df2: org.apache.spark.sql.DataFrame = [time1: timestamp, time2: timestamp] scala> df2.printSchemaroot |-- time1: timestamp (nullable = true) |-- time2: timestamp (nullable = true) scala> df2.withColumn("diff_sec",unix_timestamp('time2)-unix_timestamp('time1)).withColumn("diff_min",'diff_sec/60).show(false) time1 time2 diff_sec diff_min 2017-01-01 00:01:00 2017-01-01 00:05:00 240 4.0 scala>UPDATE1: scala> val df = Seq(("1/01/2017 12:01:00 AM"),("1/1/2017 12:05:00 AM")).toDF("timex")df: org.apache.spark.sql.DataFrame = [timex: string] scala> val df2 = df.withColumn("timex",to_timestamp('timex,"d/MM/yyyy hh:mm:ss a"))df2: org.apache.spark.sql.DataFrame = [timex: timestamp] scala> df2.show timex 2017-01-01 00:01:00 2017-01-01 00:05:00 scala> val df3 = df2.alias("t1").join(df2.alias("t2"), $"t1.timex" =!= $"t2.timex", "leftOuter").toDF("time1","time2")df3: org.apache.spark.sql.DataFrame = [time1: timestamp, time2: timestamp] scala> df3.withColumn("diff_sec",unix_timestamp('time2)-unix_timestamp('time1)).withColumn("diff_min",'diff_sec/60).show(false) time1 time2 diff_sec diff_min 2017-01-01 00:01:00 2017-01-01 00:05:00 240 4.0 2017-01-01 00:05:00 2017-01-01 00:01:00 -240 -4.0 scala> df3.withColumn("diff_sec",unix_timestamp('time2)-unix_timestamp('time1)).withColumn("diff_min",'diff_sec/60).show(1,false) time1 time2 diff_sec diff_min 2017-01-01 00:01:00 2017-01-01 00:05:00 240 4.0 only showing top 1 row scala>
社区小助手 2019-12-02 01:46:17 0 浏览量 回答数 0

回答

遗憾的是,尽管SQL Server现在支持string_split(),但不能保证返回集的顺序。 因此,我推荐一种替代方法,例如递归CTE。这是代码示例的示例: with cte as ( select convert(varchar(max), NULL) as year, convert(varchar(max), NULL) as time_of_day, convert(varchar(max), NULL) as day_of_week, convert(varchar(max), year) as year_rest, convert(varchar(max), time_of_day) as time_of_day_rest, convert(varchar(max), day_of_week) as day_of_week_rest from t union all select convert(varchar(max), left(year_rest, charindex(',', year_rest + ',') - 1)) as year, convert(varchar(max), left(time_of_day_rest, charindex(',', time_of_day_rest + ',') - 1)) as time_of_day, convert(varchar(max), left(day_of_week_rest, charindex(',', day_of_week_rest + ',') - 1)) as day_of_week, stuff(year_rest, 1, charindex(',', year_rest + ','), '') as year_rest, stuff(time_of_day_rest, 1, charindex(',', time_of_day_rest + ','), '') as time_of_day_rest, stuff(day_of_week_rest, 1, charindex(',', day_of_week_rest + ','), '') as day_of_week_rest from cte where year_rest <> '' ) select year, time_of_day, day_of_week from cte where year is not null; 这是db <>
祖安文状元 2020-01-04 15:29:00 0 浏览量 回答数 0

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