The table definition of a table variable cannot change after the DECLARE statement. Any ALTER TABLE query attempting to alter a table variable will fail with a syntax error. Along the same lines, you cannot use a table variable with SELECT INTO or INSERT EXEC queries. f you are using a ta...
如果SQL_ATTR_METADATA_ID語句屬性設定為 SQL_TRUE,則 TableName 會被視為識別碼, 而且其大小寫並不重要。 如果它是SQL_FALSE, TableName 是一般引數;它會以常值方式處理,而且其大小寫很重要。NameLength3 [輸入]*TableName 的字元長度 。唯一 [輸入]索引的類型:SQL_INDEX_UNIQUE或SQL_INDEX_ALL。
The syntax to creating a table variable is similar to creating atable, only the DECLARE keyword is used and the table name is prefixed with an @ symbol: DECLARE@TableNameTABLE(column_name <data_type> [NULL|NOTNULL] [ ,...n ] ) In this example, a table variable is used in a simil...
使用CREATE EXTERNAL TABLE建立外部數據表。 location 使用LOCATION和ALTER TABLE的CREATE TABLE子句來設定數據表位置。 owner 使用[SET] OWNER TO和ALTER TABLE的ALTER VIEW語句來轉移表或檢視的擁有權。 SET 在 Databricks SQL 中可做為選擇性關鍵詞。 provider 使用USING的CREATE TABLE子句來設定...
The following syntax describes how to declare a table variable: 1 2 3 4 5 DECLARE@LOCAL_TABLEVARIABLETABLE (column_1DATATYPE, column_2DATATYPE, column_NDATATYPE ) If we want to declare a table variable, we have to start the DECLARE statement which is similar to local variables. The name...
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...
Temporary Table vs Table Variable There are two ways to create a temporary table: 1. ‘On the fly’ by designating an “INTO” clause after a SELECT statement and before a FROM clause: 2. The same way as defining an actual table by using the following syntax: ...
syntaxsql 复制 -- External tool only syntax INSERT { [BULK] { database_name.schema_name.table_or_view_name | schema_name.table_or_view_name | table_or_view_name } ( <column_definition> ) [ WITH ( [ [ , ] CHECK_CONSTRAINTS ] [ [ , ] FIRE_TRIGGERS ] [ [ , ] KEEP_NULLS ...
Syntax The following syntax is for SQL Server and Azure SQL Database: syntaxsql DECLARE{ { @local_variable[AS]data_type[ = value ] } | { @cursor_variable_nameCURSOR} } [ ,...n ] | { @table_variable_name[AS]<table_type_definition>}<table_type_definition>::=TABLE( {<column_defini...
-- Syntax for SQL Server and Azure SQL Database [ WITH <common_table_expression> [...n] ] UPDATE [ TOP ( expression ) [ PERCENT ] ] { { table_alias | <object> | rowset_function_limited [ WITH ( <Table_Hint_Limited> [ ...n ] ) ] } | @table_variable } SET { column_name...