SQL 复制 UPDATE dbo.Categories SET Categories.CategoryName = ec.CategoryName FROM dbo.Categories INNER JOIN @tvpEditedCategories AS ec ON dbo.Categories.CategoryID = ec.CategoryID; 此Transact-SQL 示例演示如何从表值参数中选择行以在单个基于集的操作中执行 INSERT。
In this case, the UPDATE statement requests shared locks on the rows read in the join table in addition to requesting exclusive locks on the updated rows. Intent locks The Database Engine uses intent locks to protect placing a shared (S) lock or exclusive (X) lock on a resource lower in...
Create multiple nonclustered indexes on columns involved in join and grouping operations, and a clustered index on any foreign key columns. Queries that don't return large result sets. Create filtered indexes to cover queries that return a well-defined subset of rows from a large table. ...
Can I UPDATE, then INSERT if no record updated? Can I use a COLLATE clause in a temp table definition? Can I use aggregate function within CASE? Can I use if statement in a table valued function? Can I use LEN or DATALENGTH in a WHERE clause? Can I use OUTER JOIN on 2 columns at...
Is Cross join possible in SSIS Is is possible to use an ODBC connection in an SSIS Lookup Transformation? Is it possible to run multiple Data Flow tasks simultaneously? Is it possible to test the SSISDB encryption password? Is it possible to use a Like operator in conditional split Is there...
SELECT a.first_name,b.Product_name FROM [customer] A RIGHT OUTER JOIN [product] B ON a.customer_id = b.customer_id ORDER BY a.first_name 26. Get the complete record(Customer name, product name) from both tables([CustomerDetail],[ProductDetail]), if no match is found in any table...
value.format' = 'json' )值得注意的一点是，我们正在使用 record_time 字段来计算水位线—— record...
OUTER APPLY OPENJSONjoins first-level entity with sub-array and return flatten resultset. Due to JOIN, the second row is repeated for every skill. Convert SQL Server data to JSON or export JSON Note Converting Azure Synapse Analytics data to JSON or exporting JSON is not supported. ...
【大厂真题】SQL28题解 | 被重复观看次数最多的3个视频 SELECT cid,pv,rk from ( select a.cid,sum(nums) as pv, ROW_NUMBER() OVER(order by sum(nums) desc,a.release_date desc) as rk ###排名问题 from course_info_tb a inner join ( select cid,uid,count(*) nums from play_record_tb...
SELECT DB_NAME(resource_database_id) as DBName, OBJECT_NAME(resource_associated_entity_id, resource_database_id) AS ObjectName, request_mode, request_type, request_session_id, es.host_name, es.login_name, es.login_time FROM sys.dm_tran_locks tl INNER JOIN sys.dm_exec_sessions es ON ...