log_space_in_bytes_since_last_backup FROM '+QUOTENAME(@dbname) +'.sys.dm_db_log_space_usage;';BEGINTRYEXECUTE(@SQL);ENDTRYBEGINCATCHSELECTERROR_MESSAGE()ASErrorMessage;ENDCATCHFETCHNEXTFROMlog_spaceINTO@dbname;
record in SCD history in last 6 months, based on matching fact */ INNER JOIN DimLocation FOR SYSTEM_TIME BETWEEN @sixMonthsAgo AND @now AS DimLocation_History ON DimLocation_History.LocationId = F.LocationId AND F.FactDate BETWEEN DimLocation_History.ValidFrom AND DimLocation_History.Valid...
DATEDIFF(a.recordDate,b.recordDate) a-b 或 TIMESTAMPDIFF TIMESTAMPDIFF能干什么,可以计算相差天数、小时、分钟和秒,相比于datediff函数要灵活很多。 格式是时间小的前,时间大的放在后面。 计算相差天数: select from Weather as w1, Weather as w2 where TIMESTAMPDIFF(DAY, w2.RecordDate, w1.RecordDate) ...
+---+---+---+ | Id(INT) | RecordDate(DATE) | Temperature(INT) | +---+---+---+ | 1 | 2015-01-01 | 10 | | 2 | 2015-01-02 | 25 | | 3 | 2015-01-03 | 20 | | 4 | 2015-01-04 | 30 | +---+---+---+Answer: SELECT a.Id FROM...
SQL(Structured Query Language,结构化查询语言)是专门用来处理(包括查询和修改)关系型数据库的标准语言 不同关系型数据库管理系统语法(MySQL、SQL Server、Oracle)略有不同,但都是基于标准SQL,本课使用最流行的开源关系型数据库管理系统,MySQL 【第二章】在单一表格中检索数据 ...
Hello! Please excuse me for almost the same question as "Select permission" but there's one thing I'd like to be cleared up: I see that I can't query a user database (at least the databases for which the Guest account is disabled) until the… ...
recordt1INNERJOIN(SELECTdevice_id,app_version,MAX(create_time)ASmax_dateFROMdevice_recordGROUPBY...
sql语句练习题:https://blog.csdn.net/byf0521hlyp/article/details/80224840 参考链接:https://cloud.tencent.com/developer/article/1157338 1。 聚合函数不能出现在where条件语句中。 2。 有group by 时,select 中出现的字段中只能有group by 的字段和聚合函数; ...
Hence, the query returns all the goods with expiry_date set to 2023-02-24. Example 2: Get all records posted at the current hour In the last example, we demonstrated how to query data with the current date. Let’s now walk through how we can use the current time function. Again, ...
11 DATEDIFF(ms, DTDT.[database_transaction_begin_time], GETDATE()) 12 AS [Duration ms] , 13 CASE DTAT.transaction_type 14 WHEN 1 THEN 'Read/write' 15 WHEN 2 THEN 'Read-only' 16 WHEN 3 THEN 'System' 17 WHEN 4 THEN 'Distributed' ...