Query grid field in HDATA

Desktop User Guides > JDBC Driver > UNICOM Intelligence JDBC Driver specification > Query from HDATA > Query grid field in HDATA

In HDATA, grid fields are considered level. Querying a level field is same as querying all sub-fields of the level field. For more information, see Return level field.

You can query grid object sub-fields from the array table, as shown in the examples that are in this section.

Grid objects contain the specialty field LevelID, which is an element value of the current grid.

Single response grids and multiple responses grids

For information on returning categorical values in JDBC, see Return category value.

Example

Using data from the UNICOM Intelligence Developer Library museum.mdd example:

SELECT
^.name
,levelid
,column
FROM HDATA.RATING

The result data is:

^.name	levelid	column
MyName	{31}	{52}
MyName	{32}	{}
MyName	{33}	{}
MyName	{34}	{}
MyName	{35}	{}
MyName	{36}	{}
MyName	{37}	{}
MyName	{38}	{51}
MyName	{39}	{52}
MyName	{40}	{}
MyName	{41}	{50}
MyName	{42}	{51}
MyName	{43}	{}
MyName	{44}	{51}
MyName	{45}	{}
MyName	{18}	{}
	...	...

Numeric grids

Example

Using data from the UNICOM Intelligence Developer Library short_drinks.mdd example:

SELECT
Levelid
,mond
,tuesd
FROM HDATA.numdrksz

The result data is:

LevelID	mond	tuesd
{48}	5	4
{49}	2	3
{50}	0	0
{51}	0	0
{52}	0	1
{53}	0	0
{54}	0	0
{48}	3	3
{49}	4	3
{50}	0	0
{51}	0	0
{52}	0	0
{53}	0	0
{54}	0	0
...	...