TheDELETEstatement deletes one or more rows from a table permanently. Here’s the syntax of theDELETEstatement: DELETEFROMtableWHEREcondition;Code language:SQL (Structured Query Language)(sql) In this syntax: First, specify the name of the table from which you want to delete data in theDELETE...
syntaxsql複製 -- Syntax for Parallel Data WarehouseDELETE[FROM[database_name. [ schema ] . | schema. ]table_name] [WHERE<search_condition>] [OPTION(<query_options>[ ,...n ] ) ] [; ] 引數 WITH <common_table_expression> 指定定義在 DELETE 陳述式範圍內的暫存具名結果集,也稱為一般資料...
http://dev.mysql.com/doc/refman/8.0/en/with.html.Single-TableSyntaxDELETE[LOW_PRIORITY][QUICK][IGNORE]FROMtbl_name[PARTITION (partition_name [, partition_name]...)][WHERE where_condition][ORDER BY ...][LIMIT row_count]TheDELETEstatement deletes rowsfromtbl_nameandreturnsthenumberofdeleted r...
(SQL DELETE columns using the T-SQL table designer) We can use Alter table command to remove a column as well. The syntax is simple to use. The following command removes [ProductFeedback] column from the [Products] table. 我们也可以使用Alter table命令删除列。 该语法易于使用。 以下命令从[...
SQL HOME SQL Intro SQL Syntax SQL Select SQL Select Distinct SQL Where SQL Order By SQL And SQL Or SQL Not SQL Insert Into SQL Null Values SQL Update SQL Delete SQL Select Top SQL Aggregate Functions SQL Min and Max SQL Count SQL Sum SQL Avg SQL Like SQL Wildcards SQL In SQL Between...
CREATE TABLE TestBatch (ColA INT PRIMARY KEY, ColB CHAR(3)); GO INSERT INTO TestBatch VALUES (1, 'aaa'); INSERT INTO TestBatch VALUES (2, 'bbb'); INSERT INTO TestBatch VALUSE (3, 'ccc'); -- Syntax error. GO SELECT * FROM TestBatch; -- Returns no rows. GO 在下面的示...
14.1.17 CREATE SERVER Syntax 14.1.18 CREATE TABLE Syntax 14.1.18.1 CREATE TABLE ... LIKE Syntax 14.1.19 CREATE TABLESPACE Syntax 14.2.1 CALL Syntax 14.2.2 DELETE Syntax 14.2.3 DO Syntax 14.2.4 HANDLER Syntax 14.2.5 INSERT Syntax 14.2.7 LOAD XML Syntax ...
syntaxsql复制 [FROM{} [ , ...n ] ]::={table_or_view_name[FORSYSTEM_TIME<system_time>] [ [AS]table_alias] [<tablesample_clause>] [WITH(< table_hint >[ [ , ] ...n ] ) ] |rowset_function[ [AS]table_alias] [ (bulk_column_alias[ , ...n ] ) ] |user_defined_function...
syntaxsql复制 DBCCCHECKDB[ [ (database_name|database_id|0[ ,NOINDEX| , {REPAIR_ALLOW_DATA_LOSS|REPAIR_FAST|REPAIR_REBUILD} ] ) ] [WITH{ [ALL_ERRORMSGS] [ ,EXTENDED_LOGICAL_CHECKS] [ ,NO_INFOMSGS] [ ,TABLOCK] [ ,ESTIMATEONLY] [ , {PHYSICAL_ONLY|DATA_PURITY} ] [ ,MAXDOP=number...
如果语法分析错误就会出现'You have an error in your SQL syntax'错误信息。 五、优化器 优化器的作用主要是执行计划生成,进行索引选择。 比如select * from user where name = '张三' and phone = ‘110’语句,并且name和phone各建立了索引。 优化器对执行方法进行判断。