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18.04.2006, 10:53
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pervasive v8 и CROSS JOIN |
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#18+
есть ли возможность кросс-запроса в первасиве как cross join в mssql? по мануалу вроде есть но синтаксис не понятен Код: plaintext 1. пишет что ошибка сразу после второго селекта Код: plaintext 1. ... |
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19.04.2006, 08:02
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pervasive v8 и CROSS JOIN |
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#18+
Небольшой кусок help JOIN You can specify a single table or view, multiple tables, or a single view and multiple tables. When you specify more than one table, the tables are said to be joined. Syntax join-definition ::= table-reference [ join-type ] JOIN table-reference ON search- condition | table-reference CROSS JOIN table-reference | outer-join-definition join-type ::= INNER | LEFT [ OUTER ] | RIGHT [ OUTER ] | FULL [ OUTER ] outer-join-definition ::= table-reference outer-join-type JOIN table-reference ON search-condition outer-join-type ::= LEFT [ OUTER ] | RIGHT [ OUTER ] | FULL [ OUTER ] The following example illustrates a two-table outer join: SELECT * FROM Person LEFT OUTER JOIN Faculty ON Person.ID = Faculty.ID The following example shows an outer join embedded in a vendor string. The "OJ" can be either upper or lower case. SELECT t1.deptno, ename FROM {OJ emp t2 LEFT OUTER JOIN dept t1 ON t2.deptno=t1.deptno} Pervasive.SQL supports two-table outer joins as specified in the Microsoft ODBC Programmer's Reference. In addition to simple two-table outer joins, Pervasive.SQL supports n-way nested outer joins. The outer join may or may not be embedded in a vendor string. If a vendor string is used, Pervasive.SQL strips it off and parses the actual outer join text. ... |
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