//演示代码中非直接sql模式设置条件模式进行记录修改 public Long updateByQuery() { return lightDao.updateByQuery(StaffInfoVO.class, EntityUpdate.create().set("createBy", "S0001") .where("staffName like ?").values("张")); } //代码中
UnitSoldint,CONSTRAINTpk_account PRIMARYKEYNONCLUSTERED (AccountKey) );--Convert the table to columnstore.--The primary key constraint is preserved as a nonclustered index on the columnstore table.CREATECLUSTERED COLUMNSTOREINDEXt_account_cciONt_account; 啟用數據列層級和數據列群組層級鎖定來改善效能 為...
To generate unique values for each column, use the NEWID function on INSERT statements. A default value can be specified; however, NEWID can't be specified as the default. IDENTITY Indicates that the new column is an identity column. When a new row is added to the table, SQL Server ...
To generate unique values for each column, use the NEWID function on INSERT statements. A default value can be specified; however, NEWID can't be specified as the default. IDENTITY Indicates that the new column is an identity column. When a new row is added to the table, SQL Server ...
Adding multiple items to Dictionary Adding multiple rows to a datatable Adding multiple worksheet to Excel using Openxml Adding new columns dynamically Adding results of SQL query to an iEnumerable string adding scrollbar to dropdownlist Adding values inside the datatable to a Dictionary in VB.net ...
The PIVOT operator in SQL Server is used to rotate your query output 90 degrees so the unique column values can be transposed to column headers.
The BETWEEN operator is used to filter the result set within a certain range. The values can be numbers, text or dates. SELECT*FROMmoviesWHEREnameBETWEEN'A'AND'J'; # 查询movies中name以A至J开头的所有行 NB: names that begin with letter "A" up to butnot including"J". ...
_query_shipping=off;--关闭语句下推,使得计划在CN上生成SETgaussdb=#setexplain_perf_mode=normal;--调整计划显示格式SETgaussdb=#select*fromhint_t1wherehint_t1.a=1;--执行SQL语句a|b|c---+---+---1|1|1(1row)gaussdb=#\x--切换扩展显示模式,便于观察计划Expandeddisplayison.gaussdb=#selectunique_...
Can I find out the "Listener" name through a SQL Server Query Can i give a rollup an Alias? Can I have a conditional JOIN? Can I have a primary key as a non-unique column Can I pass parameter to an ALTER DATABASE command Can I prevent deadlock during concurrent delete Can I print...
issue a ROLLFORWARD DATABASE command with the QUERY STATUS option after each rollforward operation to verify that the log replay is progressing properly. If you find that a rollforward operation on the standby system is not making progress over an extended period of time, determine why the log...