ms-access

问题 I am working on a Microsoft Access Database (Office 2010) and I have a tab control on the bottom of my form that displays equipment information based on the type of equipment you select. I am trying to make it dynamically display and hide tabs as determined by the name of the tabs. To accomplish this I have used the following naming convention for my tabs. Tab_Static_Description Tab_Static_Comments Tab_Static_Maintenance Tab_Config_Computer1 Tab_Config_Computer2 Tab_Config_Printer1 Tab_Config

问题 I'm at a complete loss, a form just changed behavior on me; it was working and then just stopped for no apparent reason. I'm opening it from a button: DoCmd.openForm "formName", , , "ID=" & Me.ID Debug tracing shows that the value is set properly at this point. When the form loads, I need to set a few display items, using the OnCurrent event. Private sub Form_Current() if Me.NewRecord Then At that point, it says there's no record, debugging info says the recordset is BOF and EOF, as if the

问题 I'm at a complete loss, a form just changed behavior on me; it was working and then just stopped for no apparent reason. I'm opening it from a button: DoCmd.openForm "formName", , , "ID=" & Me.ID Debug tracing shows that the value is set properly at this point. When the form loads, I need to set a few display items, using the OnCurrent event. Private sub Form_Current() if Me.NewRecord Then At that point, it says there's no record, debugging info says the recordset is BOF and EOF, as if the

问题 I have two tables below tblLoc(LocCode) tblData(Item,LocCode) In tblData, there is extra LocCode that does not find in tblLoc. SELECT D.LocCode FROM tblData AS D WHERE D.LocCode NOT IN (SELECT LocCode FROM tblLoc); I use this query. It's slow. Is there any better query? 回答1: Use a LEFT JOIN on LocCode between tblData and tblLoc. Restrict the result set to only those rows where tblLoc LocCode is Null. Add an index on LocCode for tblLoc, if you don't already have one. SELECT d.LocCode FROM

问题 I have two tables below tblLoc(LocCode) tblData(Item,LocCode) In tblData, there is extra LocCode that does not find in tblLoc. SELECT D.LocCode FROM tblData AS D WHERE D.LocCode NOT IN (SELECT LocCode FROM tblLoc); I use this query. It's slow. Is there any better query? 回答1: Use a LEFT JOIN on LocCode between tblData and tblLoc. Restrict the result set to only those rows where tblLoc LocCode is Null. Add an index on LocCode for tblLoc, if you don't already have one. SELECT d.LocCode FROM

问题 For auto date\time we use TIMESTAMP datatype in SQL. What is equivalent to that datatype in MS Access 2007... 回答1: There is no exact equivalent in Access. To clarify, TIMESTAMP in SQL is not always a usable Date/Time, for instance in SQL Server it is deprecated and equivalent to ROWVERSION , which always returns a unique value and it not used to track date and time, even though its value is loosely derived from the current time. But let's say you want to track changes to records. In Access,

问题 I have a table in Access named TEST_DATE1 with the column TEST_DATE that is a String datatype and the records look like 20080130. yyyymmdd I have a table in Oracle named TEST with the column TEST_DATE that is a DATE datatype and I want the records to look like 2008/01/30 yyyy/mm/dd. I have the two tables linked and when I usually update tables between Access and Oracle I usually do a INSERT INTO TEST SELECT * FROM TEST_DATE1; How would you convert the string to a DATE using the INSERT INTO

问题 I am working on Universal Windows Application. I want to read ms access database file, But it seems like System.Data.Oledb namespace is not available in UWP. I don't want to use any Web Service which requires internet connectivity. Is there any solution for reading MS Access file in UWP? Thanks in advance. 回答1: There are no way to do it. Only one avaliable DB format is SQLite. You can use some converter tool By the way, soon would be available Entity Framework for SQLite databases (it is in

问题 I am working on Universal Windows Application. I want to read ms access database file, But it seems like System.Data.Oledb namespace is not available in UWP. I don't want to use any Web Service which requires internet connectivity. Is there any solution for reading MS Access file in UWP? Thanks in advance. 回答1: There are no way to do it. Only one avaliable DB format is SQLite. You can use some converter tool By the way, soon would be available Entity Framework for SQLite databases (it is in

问题 I've got an msaccess database which have been created in Access 2002. I only have access 2003 and 2008 in my computer. so I've converted the database into access 2003 format. The problem I have is that I have a table named tblItms_F001 in the database with a column named stemtext which is in memo datatype. I just want to be able to read the text inside that column in every row. (have around 150 rows only). Moreover I don't know VB and haven't used access before as database. I've used C#, Java