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Time based triggers or procedures

How to write triggers, in a table one field value decrement by one for next day

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  • better-swiss May 11, 2010

    segrireddy,



    is this SQL Server or what other product ?!?!

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Syntax to create Triggers in SQL are :

Create Trigger trigger_name // "trigger_name" : Give name to the trigger
on
table_name // "table_name" : name of the table on which trigger has to created
for Update
as

Begin

// Here Query has to be written here

End


Posted on Dec 20, 2008

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Update a record and save it in two or more tables.


First, make sure that the tables that you are using have some sort of Primary Key so that the correct records can be linked.

Next, choose 'Tools' -> 'Relationships' from the top menu.

Add the tables for which you want to link together. Drag the correct field from one table to the next table. A popup window should appear.

In the window that appears, choose the 'Enforce Referential Integrity' and 'Cascade Update Related Records' options.

Now, whenever you change the field in one of those tables, the corresponding filed in the other table should change as well.

Dec 11, 2012 | Microsoft Office Access 2003 (077-02871)...

1 Answer

How to invoke a ms.access using parser


To parse a Text field that contains two words separated by a comma, follow these steps:
  1. Open any existing database.
  2. Create a table with the following structure: Table: Parse2Words
    ------------------
    Field Name: Empl
    Data Type: Text
  3. View the Parse2Words table in Datasheet view and type the following three records in the Empl field: Smith, John
    Callahan, Laura
    Fuller, Andrew
  4. Create the following query based on the Parse2Words table: Query: QueryTest
    ------------------------------------------------------------------
    Field: FirstName: Right$([Empl],Len([Empl])- InStr(1,[Empl],",")-1)
    Show: True
    Field: LastName: Left$([Empl],InStr(1,[Empl],",")-1)
    Show: True

    NOTE: You can modify the QueryTest query to account for spaces between the two parts in the Empl field. For example, if the text in the Empl field is "Smith,John" without spaces, remove the -1 from the FirstName field expression.
  5. Run the query. Note that the QueryTest query separates the text in the Empl field into the two fields below: FirstName LastName
    --------------------
    John Smith
    Laura Callahan
    Andrew Fuller

Jan 08, 2011 | Microsoft Office Access 2003 (077-02871)...

2 Answers

Access database was copied now no tables in dropdown list


Your version of Access may require slightly different menus and clicks than mine, but the procedure is straightforward and should be very similar to what you will need to do. Read the whole post first!

Make sure you have permission to modify the database, then go to the form (I assume the drop-down table is in a form) and go to design view.

In design view, click once on the dropdown box you are having a problem with, and a properties screen with several tabs should pop up; click on the data tab, and look at 'data source'. In the list look for 'row source type' to see if the source of your data is a) a table or a query, b) a value list or c) a field list. Most dropdown boxes use either a value list or data from another table or a query (based on a table).

Check the source of data by going down to the next line in the list titled 'Row Source' (this is the list on the data tab that popped up when you clicked on the dropdown box in design view).

If the source is a table/query type you should see some code in the Row Source box like "SELECT....". Without changing anything, click once immediately to the right of the box, and whatever source the rows are coming from should pop up--if a query, for instance, it will pop up the underlying query in design view.

You should be able to troubleshoot the underlying query to see why no data is given in the dropdown box.

Another point where underlying query or table is used: If the table was based on a query that pulls data from the records in the current database, the drop down list will be blank until new records are added so the query has something to list.

And if the source is a 'value list', the values should be included in the row source box below, separated by semicolons. If not you simply need to add them in.

If your source is a field list, go back to whomever copied the database and tell them you need help with the copy they gave you...

Sep 13, 2009 | Microsoft OFFICE 2003 BASIC OEM ENGLISH MS...

1 Answer

Want to populate a form with data from a table, the Id number is keyed into the form and once it's matches with the Id in the table I want the other fields on the form to be populated with the data from...


Create a Form from the main table with a subform based on the other data you will want populated. You put the fields in the subform that you want populated from the main form. Go to the properties for the subform and select the data tab, In the data tab, select the Link Master Fields and choose the field you want linked. When you type the ID number in the main form, the other firlds you have in hte subform should populate from the data inthe table.

May 14, 2009 | Microsoft Access 2003 for PC

1 Answer

Application and example of relationship in access


Relationships

After you've set up multiple tables in your Microsoft Access database, you need a way of telling Access how to bring that information back together again. The first step in this process is to define relationships between your tables. After you've done that, you can create queries, forms, and reports to display information from several tables at once.

A relationship works by matching data in key fields - usually a field with the same name in both tables. In most cases, these matching fields are the primary key from one table, which provides a unique identifier for each record, and a foreign key in the other table. For example, teachers can be associated with the students they're responsible for by creating a relationship between the teacher's table and the student's table using the TeacherID fields.

Having met the criteria above, follow these steps for creating relationships between tables.
  1. In the database window view, at the top, click on Tools ---> Relationships
  2. Select the Tables you want to link together, by clicking on them and selecting the Add Button
  3. Drag the primary key of the Parent table (Teacher in this case), and drop it into the same field in the Child table (Student in this case.)
    relationshipdrag.jpg
  4. Select Enforce Referential Integrity
    refintegrity.jpg
    • When the Cascade Update Related Fields check box is set, changing a primary key value in the primary table automatically updates the matching value in all related records.
    • When the Cascade Delete Related Records check box is set, deleting a record in the primary table deletes any related records in the related table
  5. Click Create and Save the Relationship

Apr 09, 2009 | Microsoft Computers & Internet

1 Answer

MS Access-validation rule-for every value start with "E" or "V"


go to design view and select the Admission_Number field. At the bottom of the screen in the field properties section, select the 'Validation Rule' and input the following syntax: Like "E*" Or Like "V*"
The * indicates any character after the E or V.

Mar 21, 2009 | Microsoft Computers & Internet

1 Answer

Excel


Would you not be better off with a pivot table ?

To use multiple drop downs - each listing would need to be associated, or have a column that causes a relationship.
When selection 1 is made - a formula will dictate what fields to make visible (available) in the next menu..
you could build a macro in that will 'lift' the formulised data, and 'paste as values' it into a control area that will then give you a definitve second list based purely on the initial drop down.

Hope this makes sense

Aug 12, 2008 | Microsoft Excel for PC

1 Answer

Conversion of nemeric value


If you just want to change the format to text in a query, you can use the Str function in your query. In MS Access, in the Field area of your query in Design View, you can type the following:
YourDesiredCharFieldName: Str([YourNumericFieldName]).

On the other hand, if you prefer to convert the data once and for all in your table, you can go to the Table Design View for that Table, change the Data Type of your numeric field to "Text", and close that window to save the changes. This will convert all of your data in that field from numeric to text permanently.

Jul 01, 2008 | Microsoft Office Access 2003 (077-02871)...

1 Answer

Ms access


Stored Procedures don't exist in MS Access. You do have the following options though. Queries, which are just select or action queries. VB Code, which you can write using Query Objects as if you were writing a Visual Basic application. These can be Functions or Subroutines. In these, you would use the standard programming techniques with while and for loops, etc.

You can create complex situations combining the two of these. A function in the VB code area can accept through parameters, the single values (line by line, record by record) in a query and act on them and manipulate the values.

For example: create a query that does a select phone from address. Create a function in vb called public function StripDashesInPhone(Phone as string) which then uses VB coding to strip dashes from each phone value passed in. To make it all work, in the query on one of the field columns put "NewPhone: StripDashesInPhone([Phone])" and for every record processed in the query, the function is called with the [Phone] field value passed in to the function and the action is processed and returned.

Other than writing a function that is activated by a form button click, which opens the current db and opens a table and process it, just like in VB, this is about as close to cursors and oracle procedures as you get.

I wish it was more, but ...

Oct 09, 2007 | Microsoft Office Standard for PC

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