Data types for Oracle databases

Source: Internet
Author: User

One, character type

(1) fixed-length string CHAR(byte length is between 1~2000)

CHAR (8) can store 4 double-byte characters, 8 single-byte characters, and less than 8 bytes of the remainder are occupied with spaces

(2) variable-length string VARCHAR2(byte length is between 1~4000)

VARCHAR2 (8) stores the data size as above, less than 8 bytes of the remaining space released

(3) variable length text data LONG(up to 2GB data storage)

Second, the number type

Store integer, floating point, real number, highest precision 38-bit number

Number (10,5) indicates total digits 10 fractional Part 5 (5-bit integer, 5-bit decimal)

Number (n,m) N precision, M-Decimal part

Iii. Date and Time type

(1) Storage date time part accurate to the whole second date

(2) Storage time Date time zone accurate to entire second after 6 bit TIMESTAMP

Four or two binary data

(1) Binary data RAW(up to 2000 bytes in storage)

(2) Large number of binary data Longraw(up to 2GB data storage)

V. unstructured information for large object data type 4GB

(1) Large number of character data CLOB that is Character lob (character lob)

(2) Larger binary objects, shape, video clip, and sound BLOB -binary LOB (binary LOB)

(3) It is used to store binary data in operating system files outside the database BFILE binary file (binary)

Data types for Oracle databases

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.