CREATE[TEMPORARY]TABLE[IFNOTEXISTS] tbl_name [(create_definition,...)] [table_options] [partition_options] [IGNORE|REPLACE] [AS] query_expression 3.简单SQL表明结构: 1 CREATETABLEt7liket1; 格式: 1 CREATE[TEMPORARY]TABLE[IFNOTEXISTS] tbl_name {LIKEold_tbl_name | (LIKEold_tbl_name) } tb...
SQL CREATE TABLE Example The following example creates a table called "Persons" that contains five columns: PersonID, LastName, FirstName, Address, and City: Example CREATETABLEPersons ( PersonID int, LastName varchar(255), FirstName varchar(255), ...
The Simple SQL CREATE TABLE Statement:Using simple SQL CREATE TABLE statement we can create table with multiple columns, with each column definition consist of name, data types and optically constrains on that column value. SQL CREATE TABLE ... SELECT Statement:In SQL we can crate table as the...
Transact-SQL statements reference the temporary table by using the value specified for table_name in the CREATE TABLE statement, for example: SQL Copy CREATE TABLE #MyTempTable ( col1 INT PRIMARY KEY ); INSERT INTO #MyTempTable VALUES (1); If more than one temporary table is created insi...
Specifies that the materialized query table is maintained by the user, who can use the LOAD utility, an SQL data change statement, a SELECT from data change statement, or REFRESH TABLE SQL statements on the table. ENABLE QUERY OPTIMIZATION or DISABLE QUERY OPTIMIZATION Specifies whether this mat...
XMLType_table::=Text description of XMLType_table(XMLType_storage::=, XMLSchema_spec::=) relational_properties::=Text description of relational_properties(constraints::=) object_table_substitution::=Text description of object_table_substitutionobject_properties::=...
SQL Tutorial,Tables,Primary Key,Constraints,Foreign Key Dependencies Between Tables,Indexes,Domains Explanation Executing aCREATE TABLEstatement causes data that describes the table (or base table) to be stored in the database catalog. This data is called metadata. ...
CREATE TABLE sorted_census_data SORT BY (last_name, state) STORED AS PARQUET AS SELECT last_name, first_name, state, address FROM unsorted_census_data; The metadata for theSORT BYclause is stored in theTBLPROPERTIESfields for the table. Other SQL engines that can interoperate with Impala tab...
If a table has a PRIMARY KEY or UNIQUE NOT NULL index that consists of a single column that has an integer type, you can use _rowid to refer to the indexed column in SELECT statements, as described in Unique Indexes. In MySQL, the name of a PRIMARY KEY is PRIMARY. For other indexe...
簡單CREATE TABLE 語法 (如果沒有使用選項則通用): syntaxsql 複製 CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } ( { <column_definition> } [ ,... n ] ) [ ; ] 完整語法 磁碟型 CREATE TABLE 語法: syntaxsql ...