您的查询会是这样的:
#standardSQL
SELECT game
FROM YourTable
WHERE EXISTS (SELECT 1 FROM UNNEST(participant) WHERE name = 'sam');
这将返回所有的比赛里'sam'
是一个参与者。这里是一个自包含的例子:
#standardSQL
WITH YourTable AS (
SELECT 'A' AS game, ARRAY<STRUCT<name STRING, age INT64>>[('sam', 12), ('tony', 12), ('julia', 12)] AS participant UNION ALL
SELECT 'B', ARRAY<STRUCT<name STRING, age INT64>>[('sam', 12), ('max', 12), ('jacob', 12)] UNION ALL
SELECT 'C', ARRAY<STRUCT<name STRING, age INT64>>[('sam', 12), ('max', 12), ('julia', 12)]
)
SELECT game
FROM YourTable
WHERE EXISTS (SELECT 1 FROM UNNEST(participant) WHERE name = 'sam');
如果你想透视数据,以对每个参与者一栏,你可以使用这样的查询:
#standardSQL
CREATE TEMP FUNCTION WasParticipant(
p_name STRING, participant ARRAY<STRUCT<name STRING, age INT64>>) AS (
EXISTS(SELECT 1 FROM UNNEST(participant) WHERE name = p_name)
);
WITH YourTable AS (
SELECT 'A' AS game, ARRAY<STRUCT<name STRING, age INT64>>[('sam', 12), ('tony', 12), ('julia', 12)] AS participant UNION ALL
SELECT 'B', ARRAY<STRUCT<name STRING, age INT64>>[('sam', 12), ('max', 12), ('jacob', 12)] UNION ALL
SELECT 'C', ARRAY<STRUCT<name STRING, age INT64>>[('sam', 12), ('max', 12), ('julia', 12)]
)
SELECT
ARRAY_AGG(IF(WasParticipant('sam', participant), game, NULL) IGNORE NULLS) AS sams_games,
ARRAY_AGG(IF(WasParticipant('tony', participant), game, NULL) IGNORE NULLS) AS tonys_games,
ARRAY_AGG(IF(WasParticipant('julia', participant), game, NULL) IGNORE NULLS) AS julias_games,
ARRAY_AGG(IF(WasParticipant('max', participant), game, NULL) IGNORE NULLS) AS maxs_games
FROM YourTable;
这将返回数组为每个参与者玩游戏。
你应该澄清你的表的实际模式!另外 - 你到目前为止尝试过什么?请修改您的问题以显示您遇到问题的代码的[最小化,完整和可验证示例](http://stackoverflow.com/help/mcve),然后我们可以尝试帮助解决特定问题。你也可以阅读[如何问](http://stackoverflow.com/help/how-to-ask)。 –