我正在为我的程序定制脚本:
// You might want to use a date range and specify the first Sunday and use that variable.
// Or, you may want to have a user request variable where they key in the starting Sunday #YYYY MM DD#
// Let us work out the current week number
$iStartWeekNumber = $Today#CUSTOMDATE[%W] + 1
TEXT "Current week number (1 to 52): $iStartWeekNumber"
EOL
// Let us work out the current year
$iThisYear = $Today#CUSTOMDATE[%Y]
TEXT "Current year: $iThisYear"
EOL
// Now we can do a manual for loop from iStartWeekNumber to the end of the year
TEXT "TODO: Work out how to show the date nicely formatted"
EOL
$datWeek = $Today
LOOP AS $iWeekNumber FROM $iStartWeekNumber TO 52
$datWeek = $datWeek + 7
TEXT "Week: $iWeekNumber"
EOL
TEXT "Date: {$datWeek#SHORTDATE}"
EOL
// Iterate all available speakers
LOOP FROM "Congregation Speakers" NODATERANGE WHERE "Congregation" IS "$LocalCong" AND "notavail" IS "0" SORTBY "Speaker"
// Requirement 1
// 1. He is not in program for a talk in our home or another congregation for that same WEEKEND (either saturday or sunday)
// Store the current speaker into a variable
VARIABLE_FIELD "Speaker" "$strCurrentSpeaker"
LOOP SQL "SELECT * FROM [Home Talks] WHERE ((DatePart('ww',[Last Given],2)=$iWeekNumber)) AND ((DatePart('yyyy',[Last Given])=$iThisYear)) AND [Speaker] = '$strCurrentSpeaker' AND [Congregation]='$LocalCong'" ROW_COUNT "$iNumHomeTalks"
END_LOOP
LOOP SQL "SELECT * FROM [Away Talks] WHERE ((DatePart('ww',[Talk Date],2)=$iWeekNumber)) AND ((DatePart('yyyy',[Talk Date])=$iThisYear)) AND [Brother] = '$strCurrentSpeaker'" ROW_COUNT "$iNumAwayTalks"
END_LOOP
IF "$iNumHomeTalks" IS "0" AND "$iNumAwayTalks" IS "0"
// Requirement 2
// 2. He should not give a talk more than once in a MONTH (so he is unavailable if he will be giving a talk during the month)
$iMonth = date_part($datWeek,"M")
LOOP SQL "SELECT * FROM [Home Talks] WHERE ((DatePart('m',[Last Given])=$iMonth)) AND ((DatePart('yyyy',[Last Given])=$iThisYear)) AND [Speaker] = '$strCurrentSpeaker' AND [Congregation]='$LocalCong'" ROW_COUNT "$iNumHomeTalksForMonth"
END_LOOP
LOOP SQL "SELECT * FROM [Away Talks] WHERE ((DatePart('m',[Talk Date])=$iMonth)) AND ((DatePart('yyyy',[Talk Date])=$iThisYear)) AND [Brother] = '$strCurrentSpeaker'" ROW_COUNT "$iNumAwayTalksForMonth"
END_LOOP
$iTotalTalksForMonth = $iNumHomeTalksForMonth + $iNumAwayTalksForMonth
IF "$iTotalTalksForMonth" IS "0"
// Requirement 3
// 3. That same weekend either one or more than x speakers are not out for a talk or unavailable
// TO DO
TEXT "$strCurrentSpeaker"
EOL
END_IF
END_IF
END_LOOP
BLANK *1
END_LOOP
我想特别提醒您注意两组 SQL查询:
设置1:
LOOP SQL "SELECT * FROM [Home Talks] WHERE ((DatePart('ww',[Last Given],2)=$iWeekNumber)) AND ((DatePart('yyyy',[Last Given])=$iThisYear)) AND [Speaker] = '$strCurrentSpeaker' AND [Congregation]='$LocalCong'" ROW_COUNT "$iNumHomeTalks"
END_LOOP
LOOP SQL "SELECT * FROM [Away Talks] WHERE ((DatePart('ww',[Talk Date],2)=$iWeekNumber)) AND ((DatePart('yyyy',[Talk Date])=$iThisYear)) AND [Brother] = '$strCurrentSpeaker'" ROW_COUNT "$iNumAwayTalks"
END_LOOP
并设置2:
LOOP SQL "SELECT * FROM [Home Talks] WHERE ((DatePart('m',[Last Given])=$iMonth)) AND ((DatePart('yyyy',[Last Given])=$iThisYear)) AND [Speaker] = '$strCurrentSpeaker' AND [Congregation]='$LocalCong'" ROW_COUNT "$iNumHomeTalksForMonth"
END_LOOP
LOOP SQL "SELECT * FROM [Away Talks] WHERE ((DatePart('m',[Talk Date])=$iMonth)) AND ((DatePart('yyyy',[Talk Date])=$iThisYear)) AND [Brother] = '$strCurrentSpeaker'" ROW_COUNT "$iNumAwayTalksForMonth"
END_LOOP
以上是我自己的脚本语言。但是在后台,它接受原始SQL查询,并使用Jet在Microsoft Access数据库上运行它。
它们工作正常。但是我想知道这两组查询是否可以合并为一个?如您所见,我试图建立的只是找到的记录数。因此,如果我可以结合[Home Talks]
和[Away Talks]
的查询,那么我将只执行2个查询,而不是4个。
在我看来,我需要使用UNION
,但每个表中的一个字段都不相同:
Last Given
Talk Date
所以我不能只在两个查询之间插入关键字UNION
。
答案 0 :(得分:1)
您可以使用UNION
作为别名:
SELECT [Last Given] AS MyFieldName FROM [Home Talks]
UNION
SELECT [Talk Date] AS MyFieldName FROM [Away Talks]
您只需要列出单个字段而不是*
,并确保所有输出字段都匹配类型(或作为查询的一部分转换为字符串)和名称(别名)。
编辑:如果两个字段完全不相关(这与具有不同字段名称的相同或相似信息相反),则这是一个附加选项:
SELECT [Last Given], NULL AS [Talk Date] FROM [Home Talks]
UNION
SELECT NULL AS [Last Given], [Talk Date] FROM [Away Talks]