These CREATE TABLE examples cover all of the topics I’ve mentioned in this article. It usually helps to see examples with data and real names, rather than syntax. Each of the examples demonstrates the SQL using syntax for Oracle, SQL Server, MySQL, and PostgreSQL. Example 1 – Basic Tabl...
syntaxsql复制 -- 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|...
Transact-SQL 语法约定 语法选项 常用语法 简单的 CREATE TABLE 语法(如果不使用选项,则很常见): syntaxsql 复制 CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } ( { <column_definition> } [ ,... n ] ) [ ; ] 完整语法 基于磁盘的 CREATE TABLE...
syntaxsql 複製 CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } [ AS FileTable ] ( { <column_definition> | <computed_column_definition> | <column_set_definition> | [ <table_constraint> ] [ ,... n ] | [ <table_index> ] } [ ,......
Learn what a Common Table Expression (CTE) is in SQL, how it works, and when to use it. This guide covers syntax, benefits, and real-world examples to improve query structure and readability.
syntaxsql コピー ALTER TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } { ALTER COLUMN column_name { [ type_schema_name. ] type_name [ ( { precision [ , scale ] } ) ] [ COLLATE collation_name ] [ NULL | NOT NULL ] } | ALTER INDEX inde...
使用BULK INSERT或OPENROWSET通过 SQL Server 或 SQL 数据库进行批量加载操作 另请参阅CREATE EXTERNAL DATA SOURCE和DROP EXTERNAL TABLE。 语法 syntaxsql复制 -- Create a new external tableCREATEEXTERNALTABLE{database_name.schema_name.table_name|schema_name.table_name|table_name} (<column_definition>[ ,...
Note: The syntax of the parallel_clause supersedes syntax appearing in earlier releases of Oracle. Superseded syntax is still supported for backward compatibility, but may result in slightly different behavior than that documented. NOPARALLELSpecify NOPARALLEL for serial execution. This is the default....
Syntax Arguments Remarks Filtered index hints Show 5 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft Fabric Table hints are used to override the default behavior of the query optimizer during the data manipulation language (DML) statement....
syntaxsql Copy -- Syntax for Warehouse in Microsoft Fabric ALTER TABLE { database_name.schema_name.source_table_name | schema_name.source_table_name | source_table_name } { ADD { <column_constraint> FOR column_name} [ ,...n ] | DROP { [CONSTRAINT] constraint_name } [ ,...n ]...