SQL計數來自同一列

Question

我有一個表與以下記錄：

BookingTimeStamp BookingReloc AEType 
2016-01-14 23:19:24.773 LVWCQL Seat 
2016-01-14 23:19:24.773 LVWCQL Seat 
2016-01-14 23:19:24.773 LVWCQL Seat 
2016-01-14 16:45:29.450 KCCEMG Baggage 
2016-01-14 16:34:07.117 MEZYPN Insurance 
2016-01-14 16:08:40.617 CJXDFK Insurance 
2016-01-14 16:08:40.617 CJXDFK Insurance 
2016-01-14 16:08:40.617 CJXDFK Insurance 
2016-01-14 16:08:40.617 CJXDFK Insurance 
2016-01-14 15:14:51.633 JMILRY Seat 

我想要計數值的重複列AEType。

所需的輸出：

Seat = 4 

Baggaage = 1 

Insurance =5 

是否有可能得到它在一個單一的查詢？

Answer 1

使用'group by'按不同的參數對sql條目進行分組，'count（*）'可用於統計每個不同AEType的sql條目數。

select AEType,count(*) from Table_Name group by AEType; 

Answer 2

select AEType,count(*) from table_name 
group by AEType;