INSERTINTObookshelf(book_id,book_name,book_type,author,intime)VALUES(1,'飘','长篇小说','玛格丽特·米切尔',SYSDATE);INSERTINTObookshelf(book_id,book_name,book_type,author,intime)VALUES(2,'倾城之恋','爱情小说','张爱玲',SYSDATE);INSERTINTObookshelf(book_id,book_name,book_type,author,intime)...
Sometimes we need to change the data type of a column. To do this, we use the ALTER TABLE Modify Column command. For Oracle and MySQL, the SQL syntax for ALTER TABLE Modify Column is, ALTER TABLE "table_name" MODIFY "column_name" "New Data Type";For SQL Server, the syntax is, ALT...
mark affected indexesasunusable(DefaultFALSE)commit_discontinued--commit loaded rows when load isdiscontinued(DefaultFALSE)readsize--sizeofreadbuffer(Default1048576)external_table--use external tableforload;NOT_USED,GENERATE_ONLY,EXECUTEcolumnarrayrows--numberofrows...
SQL3210N 選項option 與command-name 中的階層結構不相容。 解說 option 不相容於 EXPORT、IMPORT 或 LOAD 中的階層結構。 使用者回應 請檢查指令語法中的階層結構支援。 SQL3211N LOAD 不支援結構化類型的表格。 解說 LOAD 不支援結構化類型的表格。請考慮 IMPORT。 使用者回應 請使用 IMPORT 把階層結構資料帶...
SELECTOBJECT_SCHEMA_NAME(i.object_id)ASschema_name, OBJECT_NAME(i.object_id)ASobject_name, i.nameASindex_name, i.type_descASindex_type,100.0* (ISNULL(SUM(rgs.deleted_rows),0)) /NULLIF(SUM(rgs.total_rows),0)ASavg_fragmentation_in_percentFROMsys.indexesASiINNERJOINsys.dm_db_column_store...
alter table tablename drop columnName column_b 2.添加删除主键 alter table tableName add constraint PK_Name primary key(Name) alter table tableName drop constraint PK_Name 3、说明:创建视图、删除视图 create view viewname as select statement ...
[FIRST|{AFTER colname}] 删除字段: ALTERTABLEtablename DROP[COLUMN] colname 添加外键: ALTERTABLEtablename ADDCONSTRAINTfknameFOREIGNKEY (colname[, ...]) REFERENCEStablename2(colname2[, ...]) [ONDELETEreference_option] [ONUPDATEreference_option] ...
ALTER SERVER CONFIGURATION SET HADR CLUSTER CONTEXT = “remote_wsfc_cluster_name” 命令将群集上下文从本地 WSFC 群集切换到此远程 WSFC 群集。 这只是一条信息性消息。 不需要任何用户操作。 19,409 10 否 AlwaysOn 可用性组的 Windows Server 故障转移群集(WSFC)群集上下文...
connectionCommand() 내에서 executeCommand()에 대한 불필요한 호출이 제거됨 릴리스 번호: 10.2.0 릴리스 날짜: 2022년 1월 31일 SQL Server용 Microsoft JDBC Driver 10.2.0(zip) 다운로드 SQL Server용 Microsoft JDBC Driver 10.2.0(tar....
UPDATE [DatabaseName1!]TableName1SET Column_Name1 = eExpression1 [, Column_Name2 = eExpression2 ...] WHERE FilterCondition1 [AND | OR FilterCondition2 ...] Parameters [DatabaseName1!]TableName1 Specifies the table in which records are updated with new values. ...