firebird null to string

NULL behaviour and pitfalls in Firebird SQL which suggests a kind of “nothi...

NULL behaviour and pitfalls in Firebird SQL which suggests a kind of “nothing” that won't do any harm if you add it to a number or stick it to the back of a string.

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This section contains some practical tips and examples that may be of use t...

This section contains some practical tips and examples that may be of use to you in your everyday dealings with NULL s. It concentrates on testing for NULL.

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You can use trigger like this. CREATE OR ALTER TRIGGER YOUR_TABELE_BIU0 FOR...

You can use trigger like this. CREATE OR ALTER TRIGGER YOUR_TABELE_BIU0 FOR YOUR_TABELE ACTIVE BEFORE INSERT OR.

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If some of the NULL ages are in reality under 18, you're now letting m...

If some of the NULL ages are in reality under 18, you're now letting minors vote! The right approach here is to test for NULL explicitly: sNVL, for strings.

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When a UDF like LTRIM (left trim) is called with a NULL argument, the argum...

When a UDF like LTRIM (left trim) is called with a NULL argument, the argument is passed to the function as an empty string. From inside the function there is no.

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It is important that in Firebird (and, as far as I know, in all other RDBMS...

It is important that in Firebird (and, as far as I know, in all other RDBMS-s except Oracle), empty string ('') and null value are two different things.

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That way, zero value will be converted by IB to string '0', while...

That way, zero value will be converted by IB to string '0', while NULL will be converted to.

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This article explores the behaviour of NULL in Firebird SQL, points out It ...

This article explores the behaviour of NULL in Firebird SQL, points out It is not zero or blank or an “empty string” and it does not behave like.

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Collection of answers to questions about Firebird null, string, adding, con...

Collection of answers to questions about Firebird null, string, adding, concatenation, varchar, char, null.

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Use the concatenation operator to concatenate two text strings. Syntax If e...

Use the concatenation operator to concatenate two text strings. Syntax If either operand is NULL, the concatenation evaluates to NULL as well. Note for Oracle.

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node-firebird - Pure javascript and asynchronous Firebird client for LIST r...

node-firebird - Pure javascript and asynchronous Firebird client for LIST returns a string consisting of the non-NULL argument values in the.

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be NULL, the result set is NULL. I have set "concat null yields null&q...

be NULL, the result set is NULL. I have set "concat null yields null" to f. Modding: Oracle MsSQL Firebird. Devshed Supreme Being (+.

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In FireBird - and only here - it's possible, that UDFs can return null...

In FireBird - and only here - it's possible, that UDFs can return null> instead of “0" or “empty string”. For example the folowing SQL SELECT F_LEFT(NULL.

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Firebird 2 Quick Start Guide. Expressions involving NULL A connection strin...

Firebird 2 Quick Start Guide. Expressions involving NULL A connection string uniquely identifies the location of the database on your.

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Firebird Null Guide. NULL behaviour and pitfalls in Firebird SQL won't...

Firebird Null Guide. NULL behaviour and pitfalls in Firebird SQL won't do any harm if you add it to a number or stick it to the back of a string.

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