SQL Server 2005?? MySQL? Group_Concat? ??????? ??? ??????
Jan 25, 2025 pm 07:17 PM
SQL Server 2005?? MySQL? group_concat ??
SQL Server 2005?? MySQL? ?? ??? group_concat ??? ???? ?? ??? ?? ???? ? ? ??? ?????. ??? ?? ??? ???? ????? ??? ???? ?? ?????? ???? ? ????.
???? ??? SQL Server? ??? ???? FOR XML PATH ??? ???? ????. ?? ??? ????.
SELECT table_name, LEFT(column_names , LEN(column_names )-1) AS column_names
FROM information_schema.columns AS extern
CROSS APPLY
(
SELECT column_name + ','
FROM information_schema.columns AS intern
WHERE extern.table_name = intern.table_name
FOR XML PATH('')
) pre_trimmed (column_names)
GROUP BY table_name, column_names;
?? ?? ??? ???? ?? ?? ??? ?? ??? ??? ????.
WITH extern AS (SELECT DISTINCT table_name FROM INFORMATION_SCHEMA.COLUMNS)
SELECT table_name, LEFT(y.column_names, LEN(y.column_names) - 1) AS column_names
FROM extern
CROSS APPLY (SELECT column_name + ','
FROM INFORMATION_SCHEMA.COLUMNS AS intern
WHERE extern.table_name = intern.table_name
FOR XML PATH(''), TYPE) x (column_names)
CROSS APPLY (SELECT x.column_names.value('.', 'NVARCHAR(MAX)')) y(column_names);
??? ??? ??? ??? ?? ?? ?? group_concat? ????? ????? ?? SQL? ?? ??? ??? ???? ????? ? ???? ?? ? ????.
? ??? SQL Server 2005?? MySQL? Group_Concat? ??????? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
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