SQL aliases are used to give a table, or a column in a table, a temporary name. Aliases are often used to make column names more readable. An alias only exists for the duration of that query. An alias is created with theASkeyword. ...
确定是否根据字段值的条件测试返回记录。 大纲 FOR SOME (table [AS t-alias]) (fieldcondition) 参数 table-Table可以是单个表,也可以是用逗号分隔的表列表。 括号是必须的。 AS t-alias- 可选-前一个表名的别名。 别名必须是有效的标识符; 它可以是一个分隔符。 fieldcondition-fieldcondition指定一个或多...
A table name can only be introduced in the FROM clause. JOIN is part of the FROM clause. But a query may include subqueries, derived tables, common table expressions, so there can be more than one FROM in a query. No, you cannot create alias beforehand for a query. Please sign ...
SQL table alias in SELECT statement:Alias a table within the SELECT statement for easier reference. SELECT T.ColumnName FROM TableName AS T; Field aliasing in SQL queries:Assign aliases to fields for better readability and naming. SELECT FirstName AS First, LastName AS Last FROM Employees; AS...
FORSOME(table[ASt-alias])(fieldcondition) 参数 table-Table可以是单个表,也可以是用逗号分隔的表列表。 括号是必须的。 AS t-alias- 可选-前一个表名的别名。 别名必须是有效的标识符; 它可以是一个分隔符。 fieldcondition-fieldcondition指定一个或多个引用一个或多个字段的条件表达式。
CREATE ALIAS MYLIB.MYMBR2_ALIAS FOR MYLIB.MYFILE (MBR2); 在下列 insert 陳述式上指定別名 MYLIB.MYMBR2_ALIAS 時,值會插入 MYLIB.MYFILE: 中的成員 MBR2 INSERT INTO MYLIB.MYMBR2_ALIAS VALUES('ABC', 6); 也可以在 DDL 陳述式上指定別名。 假設 MYLIB.MYALIAS 是表格 MYLIB.MYTABLE。 下...
An Alias in SQL is a shorthand name for a table or column name. Commonly, they are single letter names, such as, C, A, or P. They reduce the amount of typing required to enter a query.
TABLE_TYPE (ODBC 1.0)4Varchar表类型名称;下列类型之一:“TABLE”、“VIEW”、“SYSTEM TABLE”、“GLOBAL TEMPORARY”、“LOCAL TEMPORARY”、“ALIAS”、“SYNONYM”或数据源特定的类型名称。 “ALIAS”和“SYNONYM”的含义特定于驱动程序。 备注(ODBC 1.0)5Varchar表的说明。
Is an alias fortable_sourcethat can be used either for convenience or to distinguish a table or view in a self-join or subquery. An alias is frequently a shortened table name used to refer to specific columns of the tables in a join. If the same column name exists in more than one ...
BrowseForClause BuiltInFunctionTableReference BulkInsertBase BulkInsertOption BulkInsertOptionKind BulkInsertStatement BulkOpenRowset CallTarget CaseExpression CastCall CatalogCollation CatalogCollationOption CellsPerObjectSpatialIndexOption CertificateCreateLoginSource CertificateOption CertificateOptionKind...