要为表指定一个数据库,可以在 CREATE TABLE语句之前使用 USE database_name语句(在Hive 0.6和更高版本中),或者使用数据库名修饰表名(在Hive 0.7和更高版本中使用“database_name.table.name”)。 有关 table comments, table properties, 和 SerDe properties 的更多信息,请参考下面 Alter Table。 ...
And the type of each of them will also be the type of table column:Python 3.10+ from sqlmodel import Field, SQLModel, create_engine class Hero(SQLModel, table=True): id: int | None = Field(default=None, primary_key=True) name: str secret_name: str age: int | None = None # ...
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...
//1 创建表并导入数据 create table score( name string, subject string, score int) row format delimited fields terminated by "\t"; load data local inpath '/opt/module/datas/score.txt' into table score; // 计算每门学科成绩排名 select name, subject, score, rank() over(partition by subject...
在SQL Server 2008 R2 中创建新表。 Transact-SQL 语法约定语法 复制 CREATE TABLE [ database_name . [ schema_name ] . | schema_name . ] table_name ( { <column_definition> | <computed_column_definition> | <column_set_definition> | [ <table_constraint> ] [ ,...n ] } ) [ ON {...
table_identifier:支持三段式,catalog.db.name Schemas and Data Types col_type : primitive_type |nested_type primitive_type :boolean |int/integer |long/bigint |float |double |decimal(p,s),p=最大位数,s=最大小数点位数,s<=p<=38 ...
使用SQL Server 或 SQL Database 來執行大量載入作業 (使用BULK INSERT或OPENROWSET) 另請參閱CREATE EXTERNAL DATA SOURCE及DROP EXTERNAL TABLE。 語法 syntaxsql複製 -- Create a new external tableCREATEEXTERNALTABLE{database_name.schema_name.table_name|schema_name.table_name|table_name} (<column_definiti...
Databricks SQL Databricks Runtime 可以使用数据源定义托管表或外部表。 语法 复制 { { [CREATE OR] REPLACE TABLE | CREATE [EXTERNAL] TABLE [ IF NOT EXISTS ] } table_name [ table_specification ] [ USING data_source ] [ table_clauses ] [ AS query ] } table_specification ( { colum...
CREATE TABLE test (blob_col BLOB, INDEX(blob_col(10))); As of MySQL 5.7.17, if a specified index prefix exceeds the maximum column data type size, CREATE TABLE handles the index as follows: For a nonunique index, either an error occurs (if strict SQL mode is enabled), or the ind...
CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name { ({ column_name data_type [ compress_mode ] [ COLLATE collation ] [ column_constraint [ ... ] ] | table_constraint | LIKE source_table [ like_option [...] ] } [, ... ]...