Diffference between ALL_TAB_COLS and ALL_COLUMNS
What are difference use between ALL_TAB_COLS and ALL_COLUMNS?
unwilling or incapable to DESCRIBE them yourself?
SQL> desc all_tab_columns
Name Null? Type
OWNER NOT NULL VARCHAR2(30)
TABLE_NAME NOT NULL VARCHAR2(30)
COLUMN_NAME NOT NULL VARCHAR2(30)
DATA_TYPE VARCHAR2(106)
DATA_TYPE_MOD VARCHAR2(3)
DATA_TYPE_OWNER VARCHAR2(30)
DATA_LENGTH NOT NULL NUMBER
DATA_PRECISION NUMBER
DATA_SCALE NUMBER
NULLABLE VARCHAR2(1)
COLUMN_ID NUMBER
DEFAULT_LENGTH NUMBER
DATA_DEFAULT LONG
NUM_DISTINCT NUMBER
LOW_VALUE RAW(32)
HIGH_VALUE RAW(32)
DENSITY NUMBER
NUM_NULLS NUMBER
NUM_BUCKETS NUMBER
LAST_ANALYZED DATE
SAMPLE_SIZE NUMBER
CHARACTER_SET_NAME VARCHAR2(44)
CHAR_COL_DECL_LENGTH NUMBER
GLOBAL_STATS VARCHAR2(3)
USER_STATS VARCHAR2(3)
AVG_COL_LEN NUMBER
CHAR_LENGTH NUMBER
CHAR_USED VARCHAR2(1)
V80_FMT_IMAGE VARCHAR2(3)
DATA_UPGRADED VARCHAR2(3)
HISTOGRAM VARCHAR2(15)
SQL> desc all_tab_cols
Name Null? Type
OWNER NOT NULL VARCHAR2(30)
TABLE_NAME NOT NULL VARCHAR2(30)
COLUMN_NAME NOT NULL VARCHAR2(30)
DATA_TYPE VARCHAR2(106)
DATA_TYPE_MOD VARCHAR2(3)
DATA_TYPE_OWNER VARCHAR2(30)
DATA_LENGTH NOT NULL NUMBER
DATA_PRECISION NUMBER
DATA_SCALE NUMBER
NULLABLE VARCHAR2(1)
COLUMN_ID NUMBER
DEFAULT_LENGTH NUMBER
DATA_DEFAULT LONG
NUM_DISTINCT NUMBER
LOW_VALUE RAW(32)
HIGH_VALUE RAW(32)
DENSITY NUMBER
NUM_NULLS NUMBER
NUM_BUCKETS NUMBER
LAST_ANALYZED DATE
SAMPLE_SIZE NUMBER
CHARACTER_SET_NAME VARCHAR2(44)
CHAR_COL_DECL_LENGTH NUMBER
GLOBAL_STATS VARCHAR2(3)
USER_STATS VARCHAR2(3)
AVG_COL_LEN NUMBER
CHAR_LENGTH NUMBER
CHAR_USED VARCHAR2(1)
V80_FMT_IMAGE VARCHAR2(3)
DATA_UPGRADED VARCHAR2(3)
HIDDEN_COLUMN VARCHAR2(3)
VIRTUAL_COLUMN VARCHAR2(3)
SEGMENT_COLUMN_ID NUMBER
INTERNAL_COLUMN_ID NOT NULL NUMBER
HISTOGRAM VARCHAR2(15)
QUALIFIED_COL_NAME VARCHAR2(4000)
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Difference between all_tab_cols and col tables....
Dear All,
Can anyone explain me the difference between between all_tab_cols and col tables......?
Regards
krishnaHi ,
Difference between few columns views
DBA_TAB_COLUMNS has metadata for All columns of all Tables,Views and Clusters in the database.
DBA_TAB_COLUMNS view differs from DBA_TAB_COLS in that hidden columns are filtered out.
ALL_TAB_COLUMNS has metadata for Columns of user's tables, views and clusters .
ALL_TAB_COLS will have hidden columns also , similar to DBA_TAB_COLUMNS
You can also check if this web can help
http://jeffkemponoracle.blogspot.com/2007/07/do-you-know-difference-between.html
Regards
Naveed -
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