insert into table_name with clause_name as (select query ) [, clause_name1 as (select query ) …] select column1,…columnn from clause_name; 例子: –create with 语句 CREATE TABLE w_test_20 AS WITH data_info_19 AS (SELECT NVL(ename,'unknow employee') AS ename, DECODE(deptno,10,'...
insert into table_name with clause_name as (select query ) [, clause_name1 as (select query ) ...] select column1,...columnn from clause_name; 例子: --create with 语句 CREATETABLEw_test_20ASWITHdata_info_19AS(SELECTNVL(ename,'unknow employee')ASename, DECODE(deptno,10,'ACCOUNTING'...
将With CTE与CREATE/INSERT顺序一起使用是指在SQL语句中使用公共表表达式(Common Table Expression,CTE)与CREATE或INSERT语句结合使用。 公共表表达式(CTE)是一种临时命名的结果集,它在查询中可以像表一样被引用。使用CTE可以提高查询的可读性和可维护性,并且可以在多个查询中重复使用。
-- Create a new table.CREATETABLE{database_name.schema_name.table_name|schema_name.table_name|table_name} ( {column_name<data_type>[<column_options>] } [ ,...n ] ) [WITH(<table_option>[ ,...n ] ) ] [;]<column_options>::=[COLLATEWindows_collation_name] [NULL|NOTNULL]-- de...
SQL命令 CREATE TABLE(三) 字段数据约束 数据约束控制字段允许使用的值、字段的默认值以及数据值使用的排序规则类型。所有这些数据约束都是可选的。可以按任何顺序指定多个数据约束,并以空格分隔。 NULL和NOT NULL NOT NULL数据约束关键字指定该字段不接受空值;换句话说,每条记录都必须为该字段指定一个值。NULL和空字...
[ WITH ( <index_option> [ ,... n ] ) ] [ ON { partition_scheme_name ( column_name ) | filegroup_name | default } ] [ FILESTREAM_ON { filestream_filegroup_name | partition_scheme_name | "NULL" } ] } <table_option> ::= { [ DATA_COMPRESSION = { NONE | ROW | PAGE } [ ...
INSERT文を使用した場合、表に行を追加できます。表を作成した後、ALTER TABLE文でADD句を指定すると、追加する列、パーティションおよび整合性制約を定義できます。ALTER TABLE文でMODIFY句を指定すると、既存の列またはパーティションの定義を変更できます。 関連項目: オブジェクトの作成の詳細は...
Tables are created with no data unless a subquery is specified. You can add rows to a table with the INSERT statement. After creating a table, you can define additional columns, partitions, and integrity constraints with the ADD clause of the ALTER TABLE statement. You can change the definiti...
] referenced_table_name [ ( ref_column ) ] | CHECK ( logical_expression ) } <table_constraint> ::= [ CONSTRAINT constraint_name ] { { PRIMARY KEY | UNIQUE } { NONCLUSTERED ( column_name [ ASC | DESC ] [ ,... n ]) | NONCLUSTERED HASH ( column_name [ ,... n ] ) WITH ...
Select a field in theMore Fieldslist to insert the new column. Access places the field to the right of the column where your cursor is currently located. If you choose one of the field options under the Quick Start heading, such as Address, Access creates multiple fields in your table to...