SQL Server Combine two columns and aggregate into one valuePlease avoid images when forming questions - and also do include the complete query you have tried (it seems you omitted some parts). In essence what you want to do is remove the unwanted repetition of data before you use string_agg e.g:
For multiple columns (composite unique):UNIQUE (column1, column2) Example: CREATE TABLE PeopleLogins ( Username VARCHAR(20), LoginDate DATE, UNIQUE (Username, LoginDate));INSERT INTO PeopleLogins (Username, LoginDate)VALUES ('karna123', '2025-05-12');SELECT * FROM PeopleLogins; Output: Exp...
ucs = 整合通訊堆疊 (Unified Communications Stack) xtp = 極端交易處理 (extreme transaction processing) C.2 每個物件類型的計數 本節會告訴我們事件封裝包含的物件類型。 顯示sys.dm_xe_objects所有物件類型的完整清單,以及每種類型的計數。 SQL SELECT--C.2Count(*)AS[Count-of-Type], o.object_typeFROM...
2616 Enables the stack signature feature to make Sqldumper.exe generate a single dump per unique stack signature per hour, which avoids potential dump flooding problems when the same issue repeats frequently within one hour.When this trace flag is enabled, the format of the dump file will be ...
UNION allows you to stack one dataset on top of another dataset. Start Now Lesson 18 SQL Joins with Comparison Operators Use comparison operators with SQL joins, which is especially helpful for defining date ranges. Start Now Lesson 19
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XML compression XML compression provides a method to compress off-row XML data for both XML columns and indexes, improving capacity requirements. For more information, see CREATE TABLE and CREATE INDEX. Asynchronous auto update statistics concurrency Avoid potential concurrency issues using asynchronous st...
Cause: A fatal error occurred while attempting to insert data into the table. Action: Refer to the messages that follow for more information. If you specified SQL stings for any of your columns, verify that strings are correct. Specifcally, check for balanced parenthesis and correct use of ...
Convert one column of comma delimited data to multiple columns - dynamic (without using Pivot?) Convert rows to columns without aggregation Convert SQL datetime to Excel datetime convert sql variant to date Convert sql_variant to nvarchar without rounding Convert string into datetime with timezone Co...
2616 Enables the stack signature feature to make Sqldumper.exe generate a single dump per unique stack signature per hour, which avoids potential dump flooding problems when the same issue repeats frequently within one hour.When this trace flag is enabled, the format of the dump file will be ...