SQL20305N 無法插入或更新 XML 值,因為在插入或更新表格 table-name 上由index-id 識別的索引時偵測到錯誤。原因碼 = reason-code。若為與 XML 綱目相關的原因碼,XML 綱目 ID = xml-schema-id,而 XML 綱目資料類型 = xml-schema-data-type。 解說 因為下列其中一個原因碼,所以無法
DECLARE @mytablevariable my_type;。 B. 方案:替换全局临时表 将全局临时表替换为内存优化的 SCHEMA_ONLY 表非常简单。 最大的改变是在部署时(而不是运行时)创建该表。 由于采用了编译时优化,创建内存优化表会比创建传统表所用时间更长。 创建和删除内存优化表作为在线工作负载的...
7. 设置断点： BREAK ON DEPTNO [SKIP n]：根据指定列的值设置断点，用于控制输出格式。8. 系统变量设置： SET {system_variable {ON|OFF|text}}：设置SQL*PLUS的系统变量，如SET PAGESIZE 50设置每页行数。9. 变量定义与绑定： DEFINE：定义用户变量。 BINDING：用于PL/SQL中定义变量，如BINDING ...
DELETEtablename1[, ...]FROMtablename1[, ...] [WHEREcondition1 [AND|ORcondition2][...]] 查询记录 SELECT*|{[DISTINCT] {colname1|expr1|[@|@@]variable [[AS] alias1]}[, ...]} FROM{tablename [[AS] alias2]}[, ...] [WHEREcondition1 [AND|ORcondition2][...]] [GROUPBY{colna...
根据X/Open和SQL Access Group SQL CAE规范(1992)所进行的定义,SQLERROR返回SQLSTATE值。SQLSTATE值是包含五个字符的字符串,由2个字符的SQL错误类和3个字符的子类构成。五个字符包含数值或者大写字母, 代表各种错误或者警告条件的代码。成功的状态是由00000标识的。SQL
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...
{//Connect to the local, default instance of SQL Server.Server srv; srv =newServer();//Reference the AdventureWorks2022 database.Database db; db = srv.Databases["AdventureWorks2022"];//Define a Table object variable by supplying the parent database and table name in the construc...
_IN_PARTITION_PREDICATES、DELTA_UNSUPPORTED_TIME_TRAVEL_VIEWS、DELTA_UNSUPPORTED_TYPE_CHANGE_IN_SCHEMA、DELTA_UNSUPPORTED_TYPE_CHANGE_ON_COLUMNS_WITH_BLOOM_FILTER_INDEX、DELTA_UNSUPPORTED_VACUUM_SPECIFIC_PARTITION、DELTA_UNSUPPORTED_WRITES_WITHOUT_COORDINATOR、WRONG_COLUMN_DEFAULTS_FOR_DELTA_ALTER_TABLE_ADD_...
table variables provide the following benefits over temporary tables for small-scale queries that have query plans that don't change and when recompilation concerns are dominant: A table variable behaves like a local variable. It has a well-defined scope. This variable can be used in the functi...
USEAdventureWorks2022; GO-- Create a temporary table variable to hold the output actions.DECLARE@SummaryOfChangesTABLE(ChangeVARCHAR(20));MERGEINTOSales.SalesReasonASTargetUSING(VALUES('Recommendation','Other'), ('Review','Marketing'), ('Internet','Promotion'))ASSource(NewName, NewReasonType)ON...