STRUCTURE AND COMPLEXITY OF RELATIONAL QUERIES

[1] Aho Alfred V., 1979, 6TH P ACM S PRINC PR, P110

[2] EQUIVALENCES AMONG RELATIONAL EXPRESSIONS [J]. SIAM JOURNAL ON COMPUTING, 1979, 8 (02) : 218 - 246

[3] Chandra A. K., 1980, 21st Annual Symposium on Foundations of Computer Science, P333, DOI 10.1109/SFCS.1980.41

[4] Chandra A. K., 1981, P ACM S PRINC PROGR, P50

[5] COMPUTABLE QUERIES FOR RELATIONAL DATA-BASES [J]. JOURNAL OF COMPUTER AND SYSTEM SCIENCES, 1980, 21 (02) : 156 - 178

[6] CHANDRA AK, 1982, MAR P ACM S PRINC DA

[7] CHANDRA AK, 1977, 9TH P ACM S THEOR CO

[8] CODD EF, 1970, COMMUN ACM, V13, P377, DOI [10.1145/362384.362685, 10.1145/357980.358007]

[9] CODD EF, 1972, DATA BASE SYSTEMS

[10] Ehrenfeucht A., 1961, FUND MATH, V49, P129

[1] Aho Alfred V., 1979, 6TH P ACM S PRINC PR, P110

[2] EQUIVALENCES AMONG RELATIONAL EXPRESSIONS [J]. SIAM JOURNAL ON COMPUTING, 1979, 8 (02) : 218 - 246

[3] Chandra A. K., 1980, 21st Annual Symposium on Foundations of Computer Science, P333, DOI 10.1109/SFCS.1980.41

[4] Chandra A. K., 1981, P ACM S PRINC PROGR, P50

[5] COMPUTABLE QUERIES FOR RELATIONAL DATA-BASES [J]. JOURNAL OF COMPUTER AND SYSTEM SCIENCES, 1980, 21 (02) : 156 - 178

[6] CHANDRA AK, 1982, MAR P ACM S PRINC DA

[7] CHANDRA AK, 1977, 9TH P ACM S THEOR CO

[8] CODD EF, 1970, COMMUN ACM, V13, P377, DOI [10.1145/362384.362685, 10.1145/357980.358007]

[9] CODD EF, 1972, DATA BASE SYSTEMS

[10] Ehrenfeucht A., 1961, FUND MATH, V49, P129