Java DB

Apache Derby

Derby Reference Manual

Derby Getting Started
Derby Reference Manual
Derby Developer's Guide
Derby Performance Tuning
Derby Server and Admin Guide
Derby Tools and Utilities
Derby Reference Manual
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-
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-
-
-
-derby. database. readOnlyAccessUsers
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-derby. language. logStatementText
-
-
-derby. locks. escalationThreshold
-derby.locks.monitor
-
-derby. replication. logBufferSize
-derby. replication. maxLogShippingInterval
-derby. replication. minLogShippingInterval
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-
-derby. storage. minimumRecordSize
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-derby. storage. pageReservedSpace
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-
-
-
-
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-derby. stream. error. logSeverityLevel
-derby.system.bootAll
-
-derby.system.home
-derby.user.UserName
-J2EE Compliance: Java Transaction API and javax. sql Interfaces
-Derby API
-Supported territories
-Derby limitations

 

SQRT function

Returns the square root of a floating point number; only the built-in types REAL, FLOAT, and DOUBLE PRECISION are supported. The return type for SQRT is the type of the parameter.

Note: To execute SQRT on other data types, you must cast them to floating point types.

Syntax

SQRT(FloatingPointExpression)
-- throws an exception if any row stores a negative number:
VALUES SQRT(3421E+09)

-- returns the square root of an INTEGER after casting it as a
-- floating point data type:
SELECT SQRT(myDoubleColumn) FROM MyTable

VALUES SQRT (CAST(25 AS FLOAT));
Parent topic: Built-in functions
 

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