well, looks so, but there are no methods, which will return available connections.

USER>d $system.License.ConnectionListFunc().%Display()
or
d $system.License.ProcessListFunc().%Display()

Try to play around with the SetConnectionLimit() & SetUserLimit() methods.

PS: I do not know what about DBeaver, but DbVisualizer has the ability to configure one physical connection.

..
sql=0
sql($i(sql))="select *"
sql($i(sql))=",%external(DOB)||' '||%external(DOBTime) DOBString"
sql($i(sql))=",TO_CHAR(DOB||','||DOBTime,'MM/DD/YYYY HH24:MI:SS') DOBString2"
sql($i(sql))="from dc.test"
st.%ExecDirect(.st,.sql).%Display()
..

Result:

USER>##class(dc.test).Test()

ID
(INTEGER)
DOB
(DATE)
DOBTime
(TIME)
DOBString
(VARCHAR)
DOBString2
(VARCHAR)
1 01.01.2020 23:59:59 01.01.2020 23:59:59 01/01/2020 23:59:59
2 31.12.2022 10:10:10 31.12.2022 10:10:10 12/31/2022 10:10:10

I like @Yaron Munz version better

Class dc.test Abstract ]
{

ClassMethod Test()
{
  v=0,
    v($i(v))=$lb("2021-11-27","2022-08-04"),
    v($i(v))=$lb("2020-02-28","2023-02-27"),
    v($i(v))=$lb("2020-02-28","2023-03-01"),
    v($i(v))=$lb("2017-03-01","2020-02-28")
    
  i=1:1:$o(v(""),-1) {
    d1 $li(v(i),1),
      d2 $li(v(i),2),
      age1 $e(d2,1,4)-$e(d1,1,4)-($e(d1,6,10)]$e(d2,6,10)),
      age2 $number($zabs($zdh(d2,3)-$zdh(d1,3))/365.25,0),
      age3 $zdh(d2,3)-$zdh(d1,3)\365.25
      
    d1," ",d2," (age1 = ",age1,", age2 = ",age2,", age3 = ",age3,")",!
  }
}

}

Result:

USER>##class(dc.test).Test()
2021-11-27 2022-08-04 (age1 = 0, age2 = 1, age3 = 0)
2020-02-28 2023-02-27 (age1 = 2, age2 = 3, age3 = 2)
2020-02-28 2023-03-01 (age1 = 3, age2 = 3, age3 = 3)
2017-03-01 2020-02-28 (age1 = 2, age2 = 3, age3 = 2)

A simple example of combining:

Class dc.test Extends %Persistent
{

Property DOB As %Date;

Property DOBTime As %Time;

ClassMethod Test()
{
  ..%KillExtent()
  
  &sql(insert into dc.test(DOB,DOBTime)
    select {'2020-01-01'},{'23:59:59'}
    union all
    select {'2022-12-31'},{'10:10:10'})
  
  st=##class(%SQL.Statement).%New()
  st.%SelectMode=2
  
  sql=5
  sql(1)="select *"
  sql(2)=",%odbcout(DOB)||' '||%odbcout(DOBTime) DOBString"
  sql(3)=",CAST(%odbcout(DOB)||' '||%odbcout(DOBTime) as DATETIME) DOBDateTime"
  sql(4)=",UNIX_TIMESTAMP(DOB||','||DOBTime) DOBUnixTimeStamp"
  sql(5)="from dc.test"
  st.%ExecDirect(.st,.sql).%Display()
}

}

Result:

USER>##class(dc.test).Test()

ID
(INTEGER)
DOB
(DATE)
DOBTime
(TIME)
DOBString
(VARCHAR)
DOBDateTime
(TIMESTAMP)
DOBUnixTimeStamp
(NUMERIC)
1 01.01.2020 23:59:59 2020-01-01 23:59:59 2020-01-01 23:59:59 1577923199.00
2 31.12.2022 10:10:10 2022-12-31 10:10:10 2022-12-31 10:10:10 1672481410.00
2 Rows(s) Affected

Instead of two separate fields, it would be easier to use the %TimeStamp (or %PosixTime) type, where the date and time are paired at once.
For this type of data, you can make your own indexes for different parts and/or combinations of them: a separate date, a separate time, a separate year, a separate year and month, etc.
You can also use these separate parts in the query (in SELECT and WHERE).

select datediff('yy',DOB,current_dateAge from yourtable