columns (Database Toolbox)

Get database table column names

Syntax

l = columns(dbmeta, 'cata')
l = columns(dbmeta, 'cata', 'sch')
l = columns(dbmeta, 'cata', 'sch', 'tab')

Description

l = columns(dbmeta, 'cata') returns the list of all column names in the catalog cata, for the database whose database metadata object is dbmeta, where dbmeta was created using dmd.

l = columns(dbmeta, 'cata', 'sch') returns the list of all column names in the schema sch, of the catalog cata, for the database whose database metadata object is dbmeta, where dbmeta was created using dmd.

l = columns(dbmeta, 'cata', 'sch', 'tab') returns the list of columns for the table tab, in the schema sch, of the catalog cata, for the database whose database metadata object is dbmeta, where dbmeta was created using dmd.

Examples

Type

```
l = columns(dbmeta,'orcl', 'SCOTT')
```

MATLAB returns

l = 
    'BONUS'       {1x4 cell}
    'DEPT'        {1x3 cell}
    'EMP'         {1x8 cell}
    'SALGRADE'    {1x3 cell}
    'TRIAL'       {1x3 cell}

In this example:

dbmeta is the database metadata object.
orcl is the catalog cata.
SCOTT is the schema sch.

The results show the names of the five tables and a cell array containing the column names in the tables.

To see the column names for the BONUS table, type

```
l{1,2}
```

MATLAB returns

ans = 
    'ENAME'    'JOB'    'SAL'    'COMM'

which are the column names in the BONUS table.

See Also

attr, bestrowid, cols, columnnames, columnprivileges, dmd, get, versioncolumns

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