My issue is the Field Size property list is empty for the Number data type. Why is this empty? MS Access Unable to Select Number Field Size. Ask Question 1. I'm using Microsoft Access 2016 32bit on Windows 10. My issue is the Field Size property list is empty for the Number data type. Access Field Data Type Changed. Hot Network Questions.
Working with Database Fields Microsoft Access database fields are created by entering a field name and a field data type in each row of the field entry area of the database table window. The field description is an option to identify the fields purpose; it appears in the status bar during data entry. After you enter each field's name and data type, you can specify how each field is used by entering properties in the property area. Before you enter any properties, however, you should enter all of you fields names and data types.
Naming a Database Field A field name identifies the field to both you and to Microsoft Access. For information regarding field names please see the article: Specifying a Microsoft Access Data Type After you name a field, you must decide what type of data the field will hold. Before you begin entering data, you should have a grasp of the data types that your system will use. Ten basic data types are shown in the table below; some data types (such as numbers) have several options: Microsoft Access Data Types Data Type Use For Size Text Text or combinations of text and numbers, such as addresses. Also numbers that do not require calculations, such as phone numbers, part numbers, or postal codes. Up to 255 characters. Microsoft Access only stores the characters entered in a field; it does not store space characters for unused positions in a Text field.
To control the maximum number of characters that can be entered, set the FieldSize property. Memo Lengthy text and numbers, such as notes or descriptions. Up to 64,000 characters. Number Numeric data to be used for mathematical calculations, except calculations involving money (use Currency type). Set the FieldSize property to define the specific Number type.
1, 2, 4, or 8 bytes. 16 bytes for Replication ID (GUID) only. Click for more information on changing Number field sizes.
Date/Time Dates and times. Currency Currency values. Use the Currency data type to prevent rounding off during calculations. Accurate to 15 digits to the left of the decimal point and 4 digits to the right. AutoNumber Unique sequential (incrementing by 1) or random numbers automatically inserted when a record is added. 16 bytes for Replication ID (GUID) only. Yes/No Fields that will contain only one of two values, such as Yes/No, True/False, On/Off.
OLE Object Objects (such as Microsoft Word documents, Microsoft Excel spreadsheets, pictures, sounds, or other binary data), created in other programs using the OLE protocol, that can be linked to or embedded in a Microsoft Access table. You must use a bound object frame in a form or report to display the OLE object. Up to 1 gigabyte (limited by disk space).
Hyperlink Field that will store hyperlinks. A hyperlink can be a UNC path or a URL. Up to 64,000 characters. Lookup Wizard Creates a field that allows you to choose a value from another table or from a list of values using a combo box.
Choosing this option in the data type list starts a wizard to define this for you. The same size as the primary key field that is also the Lookup field; typically 4 bytes. For numeric data types, the field size enables you to further define the type of number, which in turn determines the storage size. The table below shows the seven possible settings in the Numeric Field Size property.
You should make the field size the smallest one possible; Access runs faster with smaller field sizes. Note the first three settings don’t use decimal points, but allow increasingly larger positive or negative numbers. Single and Double permit even larger numbers: Single gives you 7 decimal places, and Double allows 15. Use the Double setting when you need many decimal places or very large numbers. Numeric Field Size Properties Setting Description Decimal Precision Storage Size Byte Stores numbers from 0 to 255 (no fractions). None 1 byte Integer Stores numbers from –32,768 to 32,767 (no fractions). None 2 bytes Long Integer (Default) Stores numbers from –2,147,483,648 to 2,147,483,647 (no fractions).
None 4 bytes Decimal Stores numbers from -10^38 -1 through 10^38 -1 (.adp) Stores numbers from-10^28 -1 through 10^28 -1 (.mdb) 28 12 bytes Single Stores numbers from –3.402823E38 to –1.401298E–45 for negative values and from 1.401298E–45 to 3.402823E38 for positive values. 7 4 bytes Double Stores numbers from –1.6231E308 to –4.1247E–324 for negative values and from 1.6231E308 to 4.1247E–324 for positive values. 15 8 bytes Replication ID Globally unique identifier (GUID) N/A 16 bytes Caution: If you convert a large FieldSize setting to a smaller one in a field that already contains data, you might lose data.
For example, if you change the FieldSize setting for a Text data type field from 255 to 50, data beyond the new 50-character setting will be discarded. If the data in a Number data type field doesn't fit in a new FieldSize setting, fractional numbers may be rounded or you might get a Null value.
For example, if you change from a Single to an Integer field size, fractional values will be rounded to the nearest whole number and values greater than 32,767 or less than –32,768 will result in null fields. Tip: You can use the Currency data type if you plan to perform many calculations on a field that contains data with one to four decimal places. Single and Double data type fields require floating-point calculation. Currency data type fields use a faster fixed-point calculation.
Corruption in Access database is not only a menace for the IT professionals, but it is also one of the computing disasters of the worst form. Microsoft Access is a boon for the small and mid-sized enterprises and any forms of corrupt records in the Access database may lead to catastrophic results, with implications of financial loss. In order to retrieve the corrupt records in an Access database, the preliminary step is to create a MDB file. The objects and the relationships of all the tables, except for the table, which has corrupted records, are imported.
Only the definition of the concerned table with corrupted records is imported. The corrupted files are mostly MEMO and OLE files and multiple numbers of records can be corrupted. A MEMO field in Access stores alphanumeric data, in large amount. Notes, descriptions, comments and address fields are often stored in this type of field.
The MEMO field has several options for the rich text formatting type of property set up. The field may contain 64,000 characters.
The OLE objects can store Microsoft Excel sheets, Word documents, sound, pictures and other binary data. They can store up to 1 Gigabyte of data, constrained by the disk space. The next step is to locate the damaged or the corrupted records and this can be done in the three following ways:. Locating damages by scrolling. Locating damages with the help of append queries.
Locating the damages using programs 1. The damages are detected by scrolling, through the records, until Access pukes. Then move slowly to find the record, which is causing all the problem.
The Import dialog is used for the purpose, but with the importing of the table definition of the questionable table and by using the table definition only option. Now an append query gets created, so that all the fields from the old field is added to the new table.
The tablename. option is being used and then the query is run.
A key field value is stated in the query within a set value, excluding the key field value of the corrupted record. Thus, the uncorrupted records are appended successfully to the new database.
The minor corruptions in the MEMO field can be located by the use of a code, which loops through the MEMO fields. If there are child relationships with the table with the MEMO fields, then the ‘autonumber’ field plays an important role. A checkbox can be added to the table for the indication of a corrupted record. After this, a table query is run for adding all records, except the one with the corrupted MEMO field to another table. A delete query can delete all the records in the original table. Then all these records can be brought back in, with the help of an append query. The child relationships are all recreated.
The missing or lost records, if any can be inserted manually by the use of a backup. The system utility or the ‘Save Restore Modify Relationship Window’ are used for copying the table relationship windows layout, as the layout for the relationship window gets screwed up. The relationships of the table are recreated. All the uncorrupted objects like forms, macros, reports, modules and other tables are imported to the new file. There are many reasons for corruption of the records. One such situation is when two users are trying to change the same record, at the same time.
The Chinese character error appears. This may be due to network problem or due to some other factors like filter not working. After the filtering for the record is done, Access can find it but on pressing delete, the “Search key was not found in any record” was found. The same error message is displayed when a delete query is found to delete the record. One solution is the compacting and repairing of the Access database and the corrupted record disappears. A strategy adopted, so that one can avoid this error is to disallow two people to access the record at the same time.
The reason for the corrupted records in the Access table is mostly caused by a bad network connection or a server getting locked for a few seconds. The corrupted record problem seems to happen more for the databases, which grow larger over a period and those, which are accessed by multiple users. These are in fact the more critical databases in the world. There is an easy way to detect the corrupted records. The field by field copy or append is done from the corrupted table to the fresh table. The ‘autonumber’ field has to be set to 1 and the autocorrect option has to be put off.
If the option for compacting and repair fails, then we go for a professional software, which will. There are some specialised software, which can go for the MDB file repair and can recover all the related tables, indexes, queries and relations. However, there are some preventive methods for the avoidance of such tables with corrupted records. One of them is of course, the avoidance of the MEMO fields in Access tables. A periodic compact and repair can be run over regular intervals of time.
Other means are to put the backend database on a dedicated server. The power conditioning of the server has to be a minimum and so also for the other end user and network components.