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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 - 140: Not supported
  6. 141: Not supported
  7. 142 - 144: Not supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 100: Supported
  3. 101 - 109: Supported
  4. 110 - 123: Supported
  5. 124 - 140: Not supported
  6. 141: Not supported

Safari

  1. 3.1 - 12.1: Supported
  2. 13 - 18.6: Not supported
  3. 26.0: Not supported
  4. 26.1 - TP: Not supported

Firefox

  1. 2 - 143: Not supported
  2. 144: Not supported
  3. 145 - 147: Not supported

Opera

  1. 9 - 10.1: Not supported
  2. 10.5 - 90: Supported
  3. 91 - 109: Supported
  4. 110 - 121: Not supported
  5. 122: Not supported

IE

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

Chrome for Android

  1. 141: Not supported

Safari on iOS

  1. 3.2 - 12.5: Supported
  2. 13 - 18.6: Not supported
  3. 26.0: Not supported
  4. 26.1: Not supported

Samsung Internet

  1. 4 - 27: Supported
  2. 28: 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. 141: Not supported

Firefox for Android

  1. 143: 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