. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 4.1. Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1.3. Conditional Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 4.1.4. NULL in Expressions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311 6.1.16. Common Table Expressions (“WITH … AS … SELECT”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312 6.2. INSERT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 4.1. Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1.3. Conditional Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 4.1.4. NULL in Expressions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230 6.1.14. Common Table Expressions (“WITH … AS … SELECT”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231 6.2. INSERT

behaviour of NULL in Firebird SQL, points out common pitfalls and shows you how to deal safely with expressions that contain NULL or may resolve to NULL. If you only need a quick reference to refresh your memory (Firebird 2+) In Firebird 2 and higher only, you can test for the null-encompassing equality of two expressions with “IS [NOT] DISTINCT FROM”: if ( A is distinct from B ) then... Chapter 2. NULL support in Firebird SQL 7 if ( Buyer1 is not distinct from Buyer2 ) then... Fields, variables and other expressions are considered: • DISTINCT if they have different values or if one of them is NULL and the other

........... 3 NULL dans les expressions ..................................................................................................................... 3 Expressions retournant NULL ........... ............................................................................. 4 NULL dans des expressions booléennes ................................................................................... Firebird SQL, pointe les chausse-trappe habituelles et vous montre comment travailler avec des expressions qui contiennent NULL ou peuvent avoir un résultat NULL. Si vous voulez une référence rapide pour

which resolves integer/integer division to a float quotient, you will need to alter any affected expressions to use a float or scaled numeric type for either dividend, divisor, or both. For example, the would cause an error and halt execution.) See also the section below, Expressions involving NULL, about concatenating in expressions involving NULL. Double-quoted identifiers Before the SQL-92 standard double-quoting of all identifiers by default. Try to choose a tool which makes double-quoting optional. Expressions involving NULL In SQL, NULL is not a value. It is a condition, or state, of a data item, in which

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 6.4.3. Expressions involving NULL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . which resolves integer/integer division to a float quotient, you will need to alter any affected expressions to use a float or scaled numeric type for either dividend, divisor, or both. For example, the would cause an error and halt execution.) See also the section below, Expressions involving NULL�, about concatenating in expressions involving NULL. Chapter 6. Working with databases 36 Double-quoted

integer by an integer .......................................................................... 19 Expressions involving NULL ............................................................................... length limit for a char or a varchar (32 Kb). See also the note below, Expressions involving NULL, about concatenating in expressions involving Firebird 1.0 Quick Start Guide 18 NULL. Division of an which resolves integer/integer division to a float quotient, you will need to alter any affected expressions to use a float or scaled numeric type for either dividend, di- visor, or both. For example, the

.......................................................................................... 21 Expressions impliquant NULL .............................................................................. type char ou varchar (32 Kb). Voir aussi la note ci-dessous, Expressions impliquant NULL, à propos de la concaténation dans les expressions qui impliquent NULL. Division d'un entier par un entier Firebird entier/entier en un quotient de type nombre à virgule flottante (float), vous devrez modifier les expressions concernées pour utiliser un nombre à virgule flottante ou un type numérique proportionné pour le

Доступно: DSQL, PSQL Добавлено: 2.1 Описание: Общие табличные выражения (Common Table Expressions), сокращённо CTE, могут быть описаны как виртуальные таблицы или представления, определенных SQL ::= одиночный символ Синтаксис регулярных выражений SQL (SQL regular expressions): Следующий синтаксис определяет формат регулярного выражения SQL. Это - полное и корректное

STRING_ARGUMENT, index scanning is allowed because the conversion is deterministic. (V.2.1) Some date/time expressions in Dialect 1 can not benefit from available indices either, e.g., DATE_ FIELD > 'NOW' + 1. Resolution