Example Dynamic SQL Use Cases

You have an application that takes daily snapshots of the data in one table. You write a stored procedure that takes the table name as a parameter. Using this parameter, you write dynamic queries to analyze the data for one day.
You have a feature tracking database where you track the features that are installed for each customer. You write a stored procedure that takes a customer ID as a parameter. Using dynamic SQL, you create a FEATURE table for the customer (with the customer ID) and populate this table with the default feature set.
You want to write a table analyzer utility that returns the number of rows in a table as well as the number of unique values in each column of the table. Using dynamic SQL, you write a stored procedure that accepts the table name as a parameter and runs the calculations.

Last modified: April 24, 2021

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Verification instructions

Note: You must install cosign to verify the authenticity of the SingleStore file.

Use the following steps to verify the authenticity of singlestoredb-server, singlestoredb-toolbox, singlestoredb-studio, and singlestore-client SingleStore files that have been downloaded.

You may perform the following steps on any computer that can run cosign, such as the main deployment host of the cluster.

(Optional) Run the following command to view the associated signature files.
Shell
```
curl undefined
```
Download the signature file from the SingleStore release server.
- Option 1: Click the Download Signature button next to the SingleStore file.
- Option 2: Copy and paste the following URL into the address bar of your browser and save the signature file.
- Option 3: Run the following command to download the signature file.
  Shell
```
curl -O undefined
```

After the signature file has been downloaded, run the following command to verify the authenticity of the SingleStore file.

Shell

echo -n undefined |
    cosign verify-blob --certificate-oidc-issuer https://oidc.eks.us-east-1.amazonaws.com/id/CCDCDBA1379A5596AB5B2E46DCA385BC \
      --certificate-identity https://kubernetes.io/namespaces/freya-production/serviceaccounts/job-worker \
      --bundle undefined \
      --new-bundle-format -

Verified OK