22. Virtuoso Functions Guide - isnull
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Preface
Virtuoso Functions Guide
Administration
Aggregate Functions
Array Manipulation
BPEL APIs
Backup
Compression
Cursor
Date & Time Manipulation
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Encoding & Decoding
File Manipulation
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import_jar
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internal_type
internal_type_name
isarray
isbinary
isblob
isdouble
isentity
isfloat
isinteger
isnull
isnumeric
isstring
iszero
jvm_ref_import
make_string
sign
stringdate
stringtime
udt_defines_field
udt_get
udt_implements_metho...
udt_instance_of
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unimport_jar
UDDI
User Defined Types & The CLR
Virtuoso Java PL API
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Web & Internet
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Functions Index
isnull
returns true if its argument is NULL
isnull
(
arg
anything
);
Description
isnull returns one if its argument is NULL, zero otherwise.