ms-access

问题 In Access 2010, I have tables Task and Action that have a many-to-many relationship through table ActionTask . In the form for Task , I want to put a subform for all the Action s related to the current task through the ActionTask junction table. This, in itself, I can do. The trick is that Action is actually the bottom rank of a four-tier hierarchy of tables. Each Action belongs to a Goal , each Goal belongs to a Theme , each Theme belongs to a Strategy . Rather than just have a combo box

问题 In Access 2010, I have tables Task and Action that have a many-to-many relationship through table ActionTask . In the form for Task , I want to put a subform for all the Action s related to the current task through the ActionTask junction table. This, in itself, I can do. The trick is that Action is actually the bottom rank of a four-tier hierarchy of tables. Each Action belongs to a Goal , each Goal belongs to a Theme , each Theme belongs to a Strategy . Rather than just have a combo box

问题 I just got great help from Gord Thompson on a similar question (Combine two tables by joining on the same date or closest prior date (not just exact matches)) but now realize my data is not what I expected. It turns out I can have Lead_Dates later than Product_Interest_Dates and this is causing the previous SQL code to drop those cases. More specifically: I have two tables: CustomerID Lead_Date Lead_Source and CustomerID Product_Interest_Date Product_Interest I want two create a single table

问题 I just got great help from Gord Thompson on a similar question (Combine two tables by joining on the same date or closest prior date (not just exact matches)) but now realize my data is not what I expected. It turns out I can have Lead_Dates later than Product_Interest_Dates and this is causing the previous SQL code to drop those cases. More specifically: I have two tables: CustomerID Lead_Date Lead_Source and CustomerID Product_Interest_Date Product_Interest I want two create a single table

问题 I just got great help from Gord Thompson on a similar question (Combine two tables by joining on the same date or closest prior date (not just exact matches)) but now realize my data is not what I expected. It turns out I can have Lead_Dates later than Product_Interest_Dates and this is causing the previous SQL code to drop those cases. More specifically: I have two tables: CustomerID Lead_Date Lead_Source and CustomerID Product_Interest_Date Product_Interest I want two create a single table

问题 I've been working with Access for a while now, and although I understand the obvious benefit of a Function over a Sub, been that it can return values as a result, I'm not sure as to why I should use a Sub over a Function. After all unless I'm mistaken; Functions can do everything Subs can do? Note: I'm fully aware of how to use both Sub's and Function's so not looking for an explanation of how they work. 回答1: The main difference is not only the return value, it seems that subs are faster than

问题 I've been working with Access for a while now, and although I understand the obvious benefit of a Function over a Sub, been that it can return values as a result, I'm not sure as to why I should use a Sub over a Function. After all unless I'm mistaken; Functions can do everything Subs can do? Note: I'm fully aware of how to use both Sub's and Function's so not looking for an explanation of how they work. 回答1: The main difference is not only the return value, it seems that subs are faster than

问题 I posted the code below to the Sun developers forum since I thought it was erroring (the true error was before this code was even hit). One of the responses I got said it would not work and to throw it away. But it is actually working. It might not be the best code (I am new to Java) but is there something inherently "wrong" with it? ============= CODE: private static void ImportFromCsvToAccessTable(String mdbFilePath, String accessTableName , String csvDirPath , String csvFileName ) throws

问题 I posted the code below to the Sun developers forum since I thought it was erroring (the true error was before this code was even hit). One of the responses I got said it would not work and to throw it away. But it is actually working. It might not be the best code (I am new to Java) but is there something inherently "wrong" with it? ============= CODE: private static void ImportFromCsvToAccessTable(String mdbFilePath, String accessTableName , String csvDirPath , String csvFileName ) throws

问题 I am trying to connect to MS-Access using JDBC:ODBC: public boolean connectToAccess(String accessFilePath) { //Get connection to database try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); myConnection = DriverManager.getConnection("jdbc: odbc: driver={Microsoft Access Driver (*.mdb)};DBQ=" + accessFilePath); } catch (Exception ex) { System.out.println(ex); return false; } return true; } I get the error: "No suitable driver found for jdbc: odbc: driver={Microsoft Access Driver (*.mdb)};DBQ