我有一个名为e-classroom的数据库,其中包含表格:
tbl_enrollment
tbl_feenames
tbl_feetypes
tbl_payments
tbl_pupil
这是我从这些表中得出的观点:
view_paylist
我有这个MySQL查询将转动这些表:
SET @sql = NULL;
SELECT
GROUP_CONCAT(DISTINCT
CONCAT('MAX(IF(vp.cfeename = ''',vp.cfeename,
''', vp.nfeetypeamount, NULL)) AS ',
CONCAT("`",vp.cfeename,"`")
)
) INTO @sql
FROM view_paylist AS vp;
SET @sql = CONCAT('SELECT vp.clrn
, vp.name
, vp.cgrdlvl
, csection
, vp.csy, ', @sql, '
FROM view_paylist vp
where vp.cgrdlvl like ''%''
group by vp.clrn
');
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
这是枢轴的结果:
字段“sample”是我向tbl_feenames新添加的数据。我想要的是如何使用Crosstab在PostgreSQL中实现这种动态旋转?