What data types are available in Microsoft Access 2003

Microsoft Access 2003 provides the following data types: text, notes, numbers, date, currency, autonumbering, yes or no, OLE objects, hyperlinks, and lookup wizards.

1) Data of the "text" data type can represent data of any simple character type;

2) the "numeric" data type allows the user to enter numerical data;

3) The "DateTime" data type can store date, time, or both date and time;

4) The "Autonumber" data type stores integer values, and access will automatically increment the integer values when adding new records;

5) The "OLE Object" data type is able to access data connected to the OLE server;

7) A Lookup Wizard type field can use a list box or combo box to select a value from another table or list.

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Access has powerful data processing and statistical analysis capabilities, and the query function of Access can be used to easily carry out various types of summary and average statistics. In addition, the conditions for statistics can be flexibly set. For example, when statistically analyzing data of tens of thousands of records, hundreds of thousands of records and above, it is fast and easy to operate, which cannot be compared with Excel.

There are 13 types of data in access2003.

Including: 1. byte-type byte;

2. Boolean boolean;

3. an integer integer;

4. a long integer;

5. Currency;

6. Single-precision single;

7. Double-precision double;

8. Date;

9. String;

10. Object-type object;

11. Decimal decimal;

12 variant ( default );

13. User-defined type (using type), etc.

The access field provides ten data types, and basically all cases can be solved.

There are ten data types: Text, Notes, Numbers, Date and Time, Currency, Automatic Numbering, Yes and No, OLE Object, Hyperlink, and Lookup Wizard.

Access allows 10 data types to be cleared.

Attachments, Query Wizard.

For example, text: This type allows a maximum of 255 characters or numbers, the default size of access is 50 characters, and the system only saves the characters entered into the field, not the empty characters in the unused positions in the text field. You can set the Field Size property to control the maximum character length that can be entered.

Memo: This type is used to store long text and numbers, and it allows fields to store up to 64,000 characters. However, access cannot sort or index the comment field, but it can sort and index the text field.

The access database provides 10 data types for fields, which are as follows:

1 Text: Used to enter text or a combination of text and numbers, with a maximum of 255 characters (bytes) and a default value of 50. In access, each Chinese character and all special characters (including Chinese punctuation marks) count as one character.

2 Currency: Used to store the value of currency, accounting for 8 bytes, rounding is prohibited in calculations.

3 Number: Used for data that can be calculated numerically, except for currency. Numeric fields are divided into 7 scenarios: bytes, integers, long integers, single-precision, double-precision, synchronous replication IDs, and decimal according to the field size, accounting for 12 bytes, respectively.

4 Date Time: Used to store date and/or time values, accounting for 8 bytes.

5. Autonumber: The serial number (incrementing 1 or random number each time) is used to automatically insert when adding records, which is a long integer by default, and can also be changed to synchronous replication ID. The auto-number cannot be updated.

6. Yes no: It is used to represent the logical value (yes no, true or false) covering the rock, accounting for 1 byte.

7. Memo: It is used for long text or the combination of long text and numbers (greater than 255 characters), with a maximum of 65535 characters.

8. OLE object: used to use OLE protocol to create OLE objects (such as Word documents, Excel electronics, **, sound, etc.) in other programs, with a maximum storage of 1GB (limited by disk space).

10. Lockup Wizard: Allows users to select values from other tables or value lists through the combo box or list box, and the actual field type and length depend on the data.

Encyclopedia - Data Type

access2003 is a relational database.

Microsoft Office Access is Microsoft's database management system that combines the graphical user interface of the database engine with software development tools. Access stores data in its own format in a database engine based on Access Jet. It can also import or link data directly (which is stored in other applications and databases).

The access database type is a relational database.

Type of database:

1. According to the storage location of data, the database can be divided into: centralized and distributed;

2. According to the data model adopted, it can be divided into: hierarchical, network and relational.