数智融合计算服务 DATAARTSFABRIC-序列号生成函数:generate_series(start, stop)
时间:2025-06-17 08:50:05
generate_series(start, stop)
描述:生成一个数值序列,从start到stop,步长默认为1。
参数类型:int、bigint、numeric
返回值类型:setof int、setof bigint、setof numeric(与参数类型相同)
示例:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
SELECT * FROM generate_series(2,4); generate_series ----------------- 2 3 4 (3 rows) SELECT * FROM generate_series(4,3); generate_series ----------------- (0 rows) SELECT * FROM generate_series(1,NULL); generate_series ----------------- (0 rows) |
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