Oracle 中各种limit小结
日期：2014-05-16 浏览次数：20394 次
Oracle 中各种limit总结
Datatype Limits
| Datatypes | Limit | Comments |
|---|---|---|
BFILE |
Maximum size: 4 GB
Maximum size of a file name: 255 characters Maximum size of a directory name: 30 characters Maximum number of open BFILEs: see Comments |
The maximum number of BFILEs is limited by the value of theSESSION_MAX_OPEN_FILES initialization parameter, which is itself limited by the maximum number of open
files the operating system will allow. |
BLOB |
Maximum size: (4 GB - 1) *DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB) |
The number of LOB columns per table is limited only by the maximum number of columns per table (that is, 1000). |
CHAR |
Maximum size: 2000 bytes | None |
CHAR VARYING |
Maximum size: 4000 bytes | None |
CLOB |
Maximum size: (4 GB - 1) *DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB) |
The number of LOB columns per table is limited only by the maximum number of columns per table (that is, 1000). |
| Literals (characters or numbers in SQL or PL/SQL) | Maximum size: 4000 characters | None |
LONG |
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