<p>This six-volume set LNCS 15986-15991 constitutes the proceedings of the 30th International Conference on Database Systems for Advanced Applications, DASFAA 2025, held in Singapore, during May 26–29, 2025.<span lang="EN-US" style="font-size: 10.0pt; mso-bidi-font-size: 9.0pt; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin; mso-ansi-language: EN-US;"><br>The 136 full papers presented in this book together with 89 short papers were carefully reviewed and selected from 731 submissions. </br></span><span lang="EN-US" style="font-size: 10.0pt; mso-bidi-font-size: 9.0pt; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin; mso-ansi-language: EN-US;">They cover topics such as</span></p><p><span lang="EN-US" style="font-size: 10.0pt; mso-bidi-font-size: 9.0pt; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin; mso-ansi-language: EN-US;">Part I-<strong>&#xa0;</strong>Machine Learning and Text.<br>Part II-<strong>&#xa0;</strong>Emerging Application; NLP and&#xa0;Spatial-Temporal.<br>Part III- Graph; Knowledge Graph.<br>Part V- Recommendation and Security &amp; Privacy.<br>Part VI- Language Model; Industry Papers and Demo Papers.</br></br></br></br></span></p>