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我已經成功創建了一個MySQL View,但剛剛注意到大多數列的數據類型是「longtext」。我需要將其中一些更改爲整數,但看起來好像無法在創建View之後更改View列的數據類型。Creaet VIEW但改變選定列的數據類型
創建視圖時是否可以指定單個列的數據類型?這是我的SQL查詢:
select p.ID as order_id,
p.post_date,
max(CASE WHEN pm.meta_key = '_billing_email' and p.ID = pm.post_id
THEN pm.meta_value END) as billing_email,
max(CASE WHEN pm.meta_key = '_billing_first_name' and p.ID = pm.post_id
THEN pm.meta_value END) as _billing_first_name,
max(CASE WHEN pm.meta_key = '_billing_last_name' and p.ID = pm.post_id
THEN pm.meta_value END) as _billing_last_name,
max(CASE WHEN pm.meta_key = '_order_total' and p.ID = pm.post_id
THEN pm.meta_value END) as order_total,
max(CASE WHEN pm.meta_key = '_order_tax' and p.ID = pm.post_id
THEN pm.meta_value END) as order_tax,
max(CASE WHEN pm.meta_key = '_paid_date' and p.ID = pm.post_id
THEN pm.meta_value END) as paid_date
from wp_posts as p,
wp_postmeta as pm
where post_type = 'shop_order'
and p.ID = pm.post_id
and
and post_status = 'wc-completed'
group by p.ID
我想order_tax和ORDER_TOTAL列是整數(例如BIGINT(20))。我是一般的SQL新手,如果可能的話還找不到語法?
試試這個:MAX(...)+ 0作爲order_tax, – SIDU
我想沒有。 您應該更改表格的列的數據類型,您已經創建了一個VIEW。 視圖只是表格上的SELECT語句。 – Priyanshu
如果您現在可以更改基表,請在視圖定義中執行CAST。 – jarlh