{ { [CREATE OR] REPLACE TABLE | CREATE [EXTERNAL] TABLE [ IF NOT EXISTS ] } table_name [ table_specification ] [ USING data_source ] [ table_clauses ] [ AS query ] } table_specification ( { column_identifier co
Simple CREATE TABLE syntax (common if not using options): syntaxsql Copy CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } ( { <column_definition> } [ ,... n ] ) [ ; ] Full syntax Disk-based CREATE TABLE syntax: syntaxsql Copy CREATE...
CREATE TABLE (U-SQL): Creating a Table from a Query 项目 2017/09/05 本文内容 Summary Syntax Remarks See Also Summary Often a script converts unstructured data in a file into a table, by first extracting the data using anEXTRACTexpression and then inserting it into a tab...
create table jack.kaven2 like jack.kaven; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. [AS] query_expression 如果还需要将原始表的数据复制到目标表,可以在CREATE TABLE语句末尾添加一条SELECT语句: CREATE TABLE new_tbl AS SELECT * FROM orig_tbl; 1. 不进行...
Create Table Using Another Table A copy of an existing table can also be created usingCREATE TABLE. The new table gets the same column definitions. All columns or specific columns can be selected. If you create a new table using an existing table, the new table will be filled with the ex...
query_expression:SELECT... (Somevalidselectorunionstatement)CREATETABLEcreates atablewiththe given name. You must have theCREATEprivilegeforthetable.Bydefault, tables are createdinthedefaultdatabase, using the InnoDB storage engine. An error occursifthetableexists,ifthereisnodefaultdatabase,orifthedata...
关键字:create, drop,alter 等 2) DML(Data Manipulation Language)数据操作语言 用来对数据库中表的数据进行增删改。关键字:insert, delete, update 等 3) DQL(Data Query Language)数据查询语言 用来查询数据库中表的记录(数据)。关键字:select, where 等 4) DCL(Data Control Language)数据控制语言(了解) ...
通过println,输出 show create table orders 的物理执行计划,可看到,真正执行的是ShowCreateTableCommand这个类。 代码流程: 两个核心方法: 查hive元数据库(ObjectStore.getMTable) mtbl = (MTable) query.execute(table, db)对应的sql: 获取表的一些基本信息(tbl_id, tbl_type等) ...
+-+ | '-view-name--' '-| copy-options |-' | +-| as-result-table |--+---+--+ | '-| copy-options |-' | '-| materialized-query-definition |---' .---. V (1) | >---+---+-+->< +-+-IN--+-
C# to create an access database...with password protection. C# to delete an Excel Worksheet c# to jQuery replace " with double quote C# To Open Access Database C# to OpenOffice Calc C# to POST HTTP with XML C# to query SQL and store results in a variable C# to read S.M.A.R...