get year from a postgresql DATE
get year from a postgresql DATE 1、如果所在的列属性 mydate 本身为 DATE 类型,则使用: [sql] SELECT EXTRACT(year FROM mydate) FROM mytable; 2、如果所在的列属性 mydate 为 varchar 类型,则先使用 to_date()将其转换为 DATE类型,然后在使用 EXTRAC
get year from a postgresql DATE
1、如果所在的列属性 mydate 本身为 DATE 类型,则使用:
[sql]
SELECT EXTRACT(year FROM mydate) FROM mytable;
2、如果所在的列属性 mydate 为 varchar 类型,则先使用
to_date()将其转换为 DATE类型,然后在使用 EXTRACT year:
[sql]
SELECT EXTRACT(year FROM to_date(mydate,

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