{ { [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 column_type [ column_properties ] } [, ...] [ , table_constr...
simplify the process, U-SQL provides the ability to create a table from a U-SQL query expression. TheCREATE TABLE ASstatement will infer the schema from the query expression and will create a clustered table, thus the clustered index needs to be provided as part of theCREATE TABLE AS...
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...
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...
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...
Createtableroom ( room_nointPRIMARYKEY, room_typevarchar(20)NOTNULL, statusvarchar(10)CHECKIN('occupied','free') ); Once we execute the above query, it shows the message of ‘table created successfully’ In the previous query of SQL create we use to check to constrain with IN command we...
Perhaps a quicker way to add a table is by clicking on the small "SQL" button on the left hand side below the phpMyAdmin logo. This will bring up a query window where we can type our commands. You should run this command: 也许添加表的更快方法是单击phpMyAdmin徽标下方左侧的小“ SQL”按...
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) ...
+-+ | '-view-name--' '-| copy-options |-' | +-| as-result-table |--+---+--+ | '-| copy-options |-' | '-| materialized-query-definition |---' .---. V (1) | >---+---+-+->< +-+-IN--+-