attname   | null_frac | avg_width | n_distinct |                        most_common_vals                         |                                             most_common_freqs                                              |                                                                                                                                                        histogram_bounds                                                                                                                                                        | correlation 
-------------+-----------+-----------+------------+-----------------------------------------------------------------+------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------
 id          |         0 |         4 |         -1 |                                                                 |                                                                                                            | {9,6352,12201,16772,20303,24130,25418,27688,29427,31938,33868}                                                                                                                                                                                                                                                                 |    0.821664
 checkdate   |         0 |         8 |         -1 |                                                                 |                                                                                                            | {"2002-10-19 11:01:56.325+03","2003-03-01 05:00:53.05+02","2003-03-20 05:00:30.769+02","2003-03-30 05:00:22.981+03","2003-04-07 05:00:52.29+03","2003-04-26 05:02:40.671+03","2003-04-29 05:01:17.314+03","2003-04-30 05:00:30.248+03","2003-04-30 05:01:01.945+03","2003-04-30 05:01:23.903+03","2003-04-30 05:01:46.737+03"} |    0.922868
 assettable  |         0 |        11 |          1 | {vessels}                                                       | {1}                                                                                                        |                                                                                                                                                                                                                                                                                                                                |           1
 assetidval  |         0 |         4 |         19 | {53,57,48,65,49}                                                | {0.116,0.101,0.0933333,0.0823333,0.0673333}                                                                | {20,24,29,32,33,35,43,44,47,61,74}                                                                                                                                                                                                                                                                                             |    0.101641
 appname     |         0 |        11 |          5 | {"ISM PMS",Class.Certificates,Class.Surveys,Repairs,Class.CMS}  | {0.984667,0.00666667,0.00433333,0.00333333,0.001}                                                          |                                                                                                                                                                                                                                                                                                                                |    0.980634
 apptblname  |         0 |         9 |          4 | {items,certificates,surveys,repdat}                             | {0.985667,0.00666667,0.00433333,0.00333333}                                                                |                                                                                                                                                                                                                                                                                                                                |    0.968969
 apptblidval |         0 |         4 |       4764 | {7428,20257,2334,4656,9040,9864,11070,12975,15342,15845}        | {0.002,0.00166667,0.00133333,0.00133333,0.00133333,0.00133333,0.00133333,0.00133333,0.00133333,0.00133333} | {1,5807,8457,12503,14512,17007,19967,21821,22909,24202,35284}                                                                                                                                                                                                                                                                  |   0.0596056
 colname     |         0 |        14 |          6 | {lastrepdate,lastinspdate,rh,N/A,status,classsurvey}            | {0.637,0.316667,0.031,0.011,0.00333333,0.001}                                                              |                                                                                                                                                                                                                                                                                                                                |    0.365323
 colval      |         0 |         8 |  -0.345557 | {0,1,594,1200,784,1624,21,136,526,1231}                         | {0.012,0.00366667,0.00166667,0.00166667,0.00133333,0.00133333,0.001,0.001,0.001,0.001}                     | {24,14464.549,14494.017,18030.778,18043.42,18051.79,18060.089,18068.117,18078.319,122745.988,74262056.367}                                                                                                                                                                                                                     |    0.239448
 status      |         0 |         8 |          2 | {warn,alarm}                                                    | {0.561667,0.438333}                                                                                        |                                                                                                                                                                                                                                                                                                                                |    0.436302
 isvalid     |         0 |         1 |          2 | {f,t}                                                           | {0.675,0.325}                                                                                              |                                                                                                                                                                                                                                                                                                                                |     0.95008
 username    |         0 |        12 |          7 | {periodic,ckaklaman,amantzio,secretuser,mitsios,lignos,birtsia} | {0.876333,0.0523333,0.041,0.0143333,0.012,0.00266667,0.00133333}                                           |                                                                                                                                                                                                                                                                                                                                |    0.817096
(12 rows)