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Functions
- #arg
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- $(d)dql...
- $(db)sql;…
- ${macroExp}
- =expression
- >statement
- [a:b]
- @
- @x:…
- ~( i )
- A()
- A.( x,... )
- [a1,...an]
- abs()
- acos()
- acosh()
- aes()
- age()
- align()
- ali_open()
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- ali_query()
- alter()
- and()
- append()
- argpost
- array()
- asc()
- asin()
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- C
- Cr()
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- call path/spl(…)
- calls path/spl(…)
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- chi_p()
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- clear()
- clipboard()
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- cor()
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- cov()
- covm()
- create()
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- cursor()
- date()
- datederive()
- dateinterval()
- datetime()
- day()
- days()
- decimal()
- delete()
- deq()
- des()
- desede()
- derive()
- det()
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- digits()
- directory()
- dis()
- dism()
- dql()
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- dynadb.close()
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- dyna_open()
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- E()
- E()
- elapse()
- elasticnet()
- end s
- enum()
- env()
- eq()
- error()
- eval()
- es_close()
- es_delete()
- es_export()
- es_head()
- es_open()
- es_get()
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- exec()
- execute()
- exists()
- exp()
- export()
- exportavro()
- eye()
- f@o(…)
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- fact()
- false
- Fcoupcd()
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- fetch()
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- file()
- filename()
- fill()
- fillcons()
- fillfun()
- fillmthd()
- find()
- Fintrate()
- finv()
- Firr()
- fisher_p()
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- float()
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- for
- fork
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- freq ()
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- ftp_dir()
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- func()
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- get()
- gcd()
- gcs_bucket()
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- goto C
- group()
- groupc()
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- groups()
- groupx()
- hash()
- hbase_close()
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- hbase_filterlist()
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- hosts()
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- I()
- i()
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- if()
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- m()
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- md5()
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- memory()
- merge()
- mergex()
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- mi()
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- millisecond()
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- minp()
- minute()
- mmean()
- mnorm()
- mode()
- modify()
- mongo_close()
- mongo_open()
- mongo_shell()
- month()
- movefile()
- movmthd()
- mul()
- mse()
- mstd()
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- mvp()
- n.f(x)
- name()
- new()
- news()
- next{a}
- nodes()
- norm()
- norminv()
- not()
- now()
- ntile()
- null
- number()
- numnorm()
- nvl()
- o()
- olap_close()
- olap_open()
- olap_query()
- ones()
- open()
- or()
- oss_bucket()
- oss_close()
- oss_copy()
- oss_file()
- oss_list()
- oss_open()
- output()
- p()
- pad()
- parse()
- paste()
- pca()
- pchipmthd()
- pdate()
- pearson()
- penum()
- periods()
- permut()
- pfind()
- pi()
- pivot()
- pjoin()
- pls()
- pmax()
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- polyfit()
- pos()
- power()
- prior()
- proc()
- product()
- proportion()
- property()
- pseg()
- pselect()
- pseudo()
- psort()
- ptop()
- push()
- Qconnect()
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- Qenv()
- Qfile()
- Qload()
- Qlock()
- Qmove()
- query()
- r.(x,...)
- r.F
- r.F=x
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- r2dbc_query()
- rand()
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- rank()
- ranki()
- rankm()
- ranks()
- read()
- record()
- redis_close()
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- regex()
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- remainder()
- rename()
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- report_open()
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- reportlite_run()
- reset()
- result
- return xi
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- rmmissdim()
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- rsa()
- run()
- rvs()
- s3_bucket()
- s3_close()
- s3_copy()
- s3_file()
- s3_list()
- s3_open()
- sap_client()
- sap_close()
- sap_cursor()
- sap_execute()
- sap_getparam()
- sap_table()
- savepoint()
- sbs()
- se()
- second()
- segp()
- select()
- seq()
- sert()
- setenum()
- sf_close()
- sf_open()
- sf_query()
- sf_wsdlclose()
- sf_wsdlopen()
- sf_wsdlquery()
- sf_wsdlview()
- sg()
- shift()
- sign()
- sin()
- sinh()
- size()
- skew()
- skip()
- sleep()
- smooth()
- sort()
- sortx()
- spark_open()
- spark_close()
- spark_cursor()
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- spark_read()
- spearman()
- splinemthd()
- split()
- splserver()
- sqlparse()
- sqltranslate()
- substr()
- stax_close()
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- stax_cursor()
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- sqrt()
- step()
- string()
- structure
- sum()
- svm()
- swap()
- switch()
- syncfile(hs,p)
- system()
- T()
- tarcorskew()
- tan()
- tanh()
- time()
- tinv()
- to()
- top()
- total()
- transpose()
- trim()
- true
- try
- ttest_p()
- typeof(x)
- union()
- update()
- upper()
- urlencode()
- uuid()
- v()
- var()
- var(V)
- var(x)
- was_bucket()
- was_close()
- was_copy()
- was_file()
- was_list()
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- web_crawl()
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- words()
- workday()
- workdays()
- write()
- ws_call()
- ws_client()
- xjoin()
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- xlscell()
- xlsclose()
- xlsexport()
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- xlsmove()
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- xml()
- xor()
- xunion()
- year()
- ym2_close()
- ym2_env()
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- ym2_model()
- ym2_pcfload()
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- zeros()
- zip()
- zip_add()
- zip_close()
- zip_compress()
- zip_del()
- zip_encrypt()
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- Intersection of sequences
- Comparison operation
- Hexadecimal long integer
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- The writing rules for expression x in loop functions
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union()
Description:
Compute the union of sequence-type members in a sequence.
Synatax:
A.union(x)
Note:
The function gets union of sub-sequences of sequence A. It retains only one of the duplicate members in different sub-sequences, and does not treat members having same values in one sub-sequence as duplicates.
When parameter x is present, the function first computes the expression with each member of sequence A and then perform the union.
Parameter:
|
A |
A sequence whose members are sequences |
|
x |
An expression that returns a sequence; cannot be omitted when members of A are table sequences or record sequences |
Return value:
Sequence
Example:
When A is a sequence:
|
|
A |
|
|
1 |
=[[1,2,3,4,5],[3,7,8]].union() |
[1,2,3,4,5,7,8]; members having same value "3" appears only once. |
|
2 |
=[[1,2,2],[3,4,4],[4]].union() |
[1,2,2,3,4,4]; there are two member "4" in the second sub-sequence, which are not treated as duplicates, so both are retained in the union result. |
|
3 |
=[[1,2,2],[2,2,2,3],[2]].union() |
[1,2,2,2,3]; as there are three member "2" in the second sub-sequence, the final result also has three "2"s. |
When A is a table sequence or a record sequence:
|
|
A |
|
|
1 |
=demo.query("select * from STUDENTS where ID>3") |
|
|
2 |
=demo.query("select * from STUDENTS1") |
|
|
3 |
=[A1,A2].union(~.(NAME)) |
["Lauren","Michael","John","Nicholas","Emily","Elizabeth","Sean"], where "Lauren" is a duplicate in both NAME sequences of [A1,A2], so only one is retained. |
