mirror of
https://github.com/GreptimeTeam/greptimedb.git
synced 2026-01-14 09:12:57 +00:00
63 lines
1.8 KiB
Plaintext
63 lines
1.8 KiB
Plaintext
CREATE TABLE monitor (host STRING, ts TIMESTAMP, cpu DOUBLE DEFAULT 0, memory DOUBLE, TIME INDEX (ts), PRIMARY KEY(host));
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Affected Rows: 0
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INSERT INTO monitor(ts, host, cpu, memory) VALUES
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(1655276557000, 'host1', 66.6, 1024),
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(1655276557000, 'host2', 66.6, 1024),
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(1655276557000, 'host3', 66.6, 1024),
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(1655276558000, 'host1', 77.7, 2048),
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(1655276558000, 'host2', 77.7, 2048),
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(1655276558000, 'host3', 77.7, 2048),
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(1655276559000, 'host1', 88.8, 4096),
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(1655276559000, 'host2', 88.8, 4096),
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(1655276559000, 'host3', 88.8, 4096);
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Affected Rows: 9
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SELECT ts, host, cpu, memory FROM monitor ORDER BY ts;
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+---------------------+-------+------+--------+
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| ts | host | cpu | memory |
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+---------------------+-------+------+--------+
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| 2022-06-15T07:02:37 | host1 | 66.6 | 1024.0 |
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| 2022-06-15T07:02:37 | host2 | 66.6 | 1024.0 |
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| 2022-06-15T07:02:37 | host3 | 66.6 | 1024.0 |
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| 2022-06-15T07:02:38 | host1 | 77.7 | 2048.0 |
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| 2022-06-15T07:02:38 | host2 | 77.7 | 2048.0 |
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| 2022-06-15T07:02:38 | host3 | 77.7 | 2048.0 |
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| 2022-06-15T07:02:39 | host1 | 88.8 | 4096.0 |
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| 2022-06-15T07:02:39 | host2 | 88.8 | 4096.0 |
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| 2022-06-15T07:02:39 | host3 | 88.8 | 4096.0 |
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+---------------------+-------+------+--------+
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DELETE FROM monitor WHERE host = 'host1' AND ts = 1655276557000;
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Affected Rows: 1
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DELETE FROM monitor WHERE host = 'host2';
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Affected Rows: 3
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DELETE FROM monitor WHERE cpu = 66.6;
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Affected Rows: 1
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DELETE FROM monitor WHERE memory > 2048;
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Affected Rows: 2
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SELECT ts, host, cpu, memory FROM monitor ORDER BY ts;
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+---------------------+-------+------+--------+
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| ts | host | cpu | memory |
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+---------------------+-------+------+--------+
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| 2022-06-15T07:02:38 | host1 | 77.7 | 2048.0 |
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| 2022-06-15T07:02:38 | host3 | 77.7 | 2048.0 |
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+---------------------+-------+------+--------+
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DROP TABLE monitor;
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Affected Rows: 1
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