Can I use
?

Web SQL Database

- UNOFF

Method of storing data client-side, allows SQLite database queries for access and manipulation.

Chrome

  1. 4 - 100: Supported
  2. 101 - 109: Supported
  3. 110 - 118: Supported
  4. 119 - 123: Supported
  5. 124: Not supported
  6. 125 - 127: Not supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 100: Supported
  3. 101 - 109: Supported
  4. 110 - 122: Supported
  5. 123: Supported

Safari

  1. 3.1 - 12.1: Supported
  2. 13 - 17.3: Not supported
  3. 17.4: Not supported
  4. 17.5 - TP: Not supported

Firefox

  1. 2 - 124: Not supported
  2. 125: Not supported
  3. 126 - 128: Not supported

Opera

  1. 9 - 10.1: Not supported
  2. 10.5 - 90: Supported
  3. 91 - 108: Supported
  4. 109: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 123: Supported

Safari on iOS

  1. 3.2 - 12.5: Supported
  2. 13 - 17.3: Not supported
  3. 17.4: Not supported
  4. 17.5: Not supported

Samsung Internet

  1. 4 - 23: Supported
  2. 24: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10: Not supported
  2. 11 - 12.1: Supported
  3. 80: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 4.4.4: Supported
  2. 123: Supported

Firefox for Android

  1. 124: Not supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Not supported

The Web SQL Database specification is no longer being maintained and support is intended to be dropped in future versions. Migrate to e.g. Web Storage or IndexedDB.

Resources:
Chrome platform status: Deprecate and remove WebSQL in non-secure contexts
HTML5 Doctor article
has.js test