巴科斯范式 实现 自定义简单sql where 语法检查 <simple_where_params> ::= ( <syntax_statement> <separator>+ ( <and_option> | <or_option> ) <separator>+ )* <syntax_statement> <syntax_statement> ::= <compare_statement> | <in_statement> <compare_statement> ::= <field_name> <separator>+...
14.2.9.3 UNION Syntax 14.2.10 Subquery Syntax s A subquery is aSELECTstatement within another statement. 14.2.10.1 The Subquery as Scalar Operand note:For the subquery just shown, ift1were empty, the result would beNULLeven thoughs2isNOT NULL. 14.2.10.2 Comparisons Using Subqueries 14.2.11 UP...
bnf=%3Csimple_where_params%3E%20%3A%3A%3D%20(%20%3Csyntax_statement%3E%20%3Cseparator%3E%2B%20(%20%3Cand_option%3E%20%7C%20%3Cor_option%3E%20)%20%3Cseparator%3E%2B%20)*%20%3Csyntax_statement%3E%0A%0A%3Csyntax_statement%3E%20%3A%3A%3D%20%3Ccompare_statement%3E%20%7C%20%3Cin_...
27 Data Warehouse Service SQL Syntax Keyword SPACE SPECIFIC SPECIFICTYPE SPECIFIC_NAME SPILL SPLIT SQL SQLCODE SQLERROR SQLEXCEPTION SQLSTATE SQLWARNING STABLE STANDALONE START STATE STATEMENT STATEMENT_ID STATIC STATISTICS STDIN STDOUT STORAGE STORE STRICT STRIP STRUCTURE STYLE GaussDB(DWS) - - - - ...
Syntax for SQL Statements SQL statements are the means by which programs and users access data in an Oracle database. The sections that follow show each SQL statement and its related syntax. Refer toSubclausesfor the syntax of the subclauses listed in the syntax for the statements. ...
USEmaster; GO-- Get the SQL Server data path.DECLARE@data_pathnvarchar(256);SET@data_path = (SELECTSUBSTRING(physical_name,1,CHARINDEX(N'master.mdf',LOWER(physical_name)) -1)FROMmaster.sys.master_filesWHEREdatabase_id =1ANDfile_id =1);-- Execute the CREATE DATABASE statement.EXECUTE('...
INVALID_ATTRIBUTE_NAME_SYNTAX、INVALID_BUCKET_COLUMN_DATA_TYPE、INVALID_EXTRACT_FIELD、INVALID_FORMAT、INVALID_PARTITION_OPERATION、INVALID_SHARED_ALIAS_NAME、INVALID_STATEMENT_OR_CLAUSE、INVALID_WINDOW_SPEC_FOR_AGGREGATION_FUNC、LOCAL_MUST_WITH_SCHEMA_FILE、MERGE_WITHOUT_WHEN、MIGRATION_NOT_SUPPORTED、...
SyntaxSQL Server、Azure SQL Database、Azure SQL 受控執行個體的語法syntaxsql 複製 CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON ( column [ ASC | DESC ] [ ,...n ] ) [ INCLUDE ( column_name [ ,...n ] ) ] [ WHERE <filter_predicate> ] [ WITH ( <rel...
syntaxsql Kopiera CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON ( column [ ASC | DESC ] [ ,...n ] ) [ INCLUDE ( column_name [ ,...n ] ) ] [ WHERE <filter_predicate> ] [ WITH ( <relational_index_option> [ ,...n ] ) ] [ ON { partition_...
SELECT BusinessEntityID, VacationHours FROM HumanResources.Employee WHERE BusinessEntityID = 4; 在会话 2 上: SQL 复制 -- Commit the transaction. COMMIT TRANSACTION; GO 在会话 1 上: SQL 复制 -- Reissue the SELECT statement which now shows the -- employee having 40 vacation h...