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Update 24-show.md

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@ -22,6 +22,14 @@ SHOW CLUSTER;
Shows information about the current cluster. Shows information about the current cluster.
## SHOW CLUSTER ALIVE
```sql
SHOW CLUSTER ALIVE;
```
It is used to check whether the cluster is available or not. Return value: 0 means unavailable, 1 means available, 2 means partially available (some dnodes are offline, the other dnodes are available)
## SHOW CONNECTIONS ## SHOW CONNECTIONS
```sql ```sql