Databases
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Postsdbo
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    <p>The character length for a character column can be found in <strong>user_tab_columns.CHAR_LENGTH</strong>,</p> <pre><code>select column_name, comments from all_col_comments where table_name = 'USER_TAB_COLUMNS'; COLUMN_NAME COMMENTS TABLE_NAME Table, view or cluster name COLUMN_NAME Column name DATA_TYPE Datatype of the column DATA_TYPE_MOD Datatype modifier of the column DATA_TYPE_OWNER Owner of the datatype of the column DATA_LENGTH Length of the column in bytes DATA_PRECISION Length: decimal digits (NUMBER) or binary digits (FLOAT) DATA_SCALE Digits to right of decimal point in a number NULLABLE Does column allow NULL values? COLUMN_ID Sequence number of the column as created DEFAULT_LENGTH Length of default value for the column DATA_DEFAULT Default value for the column NUM_DISTINCT The number of distinct values in the column LOW_VALUE The low value in the column HIGH_VALUE The high value in the column DENSITY The density of the column NUM_NULLS The number of nulls in the column NUM_BUCKETS The number of buckets in histogram for the column LAST_ANALYZED The date of the most recent time this column was analyzed SAMPLE_SIZE The sample size used in analyzing this column CHARACTER_SET_NAME Character set name CHAR_COL_DECL_LENGTH Declaration length of character type column GLOBAL_STATS Are the statistics calculated without merging underlying partitions? USER_STATS Were the statistics entered directly by the user? AVG_COL_LEN The average length of the column in bytes CHAR_LENGTH The maximum length of the column in characters CHAR_USED C is maximum length given in characters, B if in bytes V80_FMT_IMAGE Is column data in 8.0 image format? DATA_UPGRADED Has column data been upgraded to the latest type version format? HISTOGRAM </code></pre> <p>Use this query to find the character length of the column,</p> <pre><code>select char_length from user_tab_columns where table_name = 'T' and column_name = 'SOME_ATTRIBUTE'; </code></pre>
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    1. POHow to obtain the length of VARCHAR2 attribute declared in Oracle Object Type, using OracleTypeCHAR metadata, regardless of database character set
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    1. USJanek Bogucki
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    1. COI would like to retrieve this metadata for oracle object type attribute, not for table column.
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      1. USmorisil
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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