dFirst()函数
时 间:2020-03-21 07:49:54
作 者:souelove ID:7327 城市:郑州
摘 要:dFirst()
正 文:
' *************************** ' Typical Use ' Numerical values. Replace "number" with the number to use. variable = DFirst("[FieldName]", "TableName", "[Criteria] = number") ' Strings. ' Numerical values. Replace "string" with the string to use. variable = DFirst("[FieldName]", "TableName", "[Criteria]= 'string'") ' Dates. Replace "date" with the string to use. variable = DFirst("[FieldName]", "TableName", "[Criteria]= #date#") ' *************************** ' *************************** ' Referring to a control on a form ' Numerical values variable = DFirst("[FieldName]", "TableName", "[Criteria] = " & Forms!FormName!ControlName) ' Strings variable = DFirst("[FieldName]", "TableName", "[Criteria] = '" & Forms!FormName!ControlName & "'") ' Dates variable = DFirst("[FieldName]", "TableName", "[Criteria] = #" & Forms!FormName!ControlName & "#") ' *************************** ' *************************** ' Combinations ' Multiple types of criteria variable = DFirst("[FieldName]", "TableName", "[Criteria1] = " & Forms![FormName]![Control1] _ & " AND [Criteria2] = '" & Forms![FormName]![Control2] & "'" _ & " AND [Criteria3] =#" & Forms![FormName]![Control3] & "#") ' Use two fields from a single record. variable = DFirst("[LastName] & ', ' & [FirstName]", "tblPeople", "[PrimaryKey] = 7") ' Expressions variable = DFirst("[Field1] + [Field2]", "tableName", "[PrimaryKey] = 7") ' Control Structures variable = DFirst("IIf([LastName] Like 'Smith', 'True', 'False')", "tableName", "[PrimaryKey] = 7") ' ***************************
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