The phrase "a substantial database" is correct and usable in written English.
It can be used when referring to a large and significant collection of data that is organized for easy access and analysis.
Example: "The research team has compiled a substantial database of climate change data to support their findings."
Alternatives: "a significant database" or "a considerable database".
SSRN has a substantial database and software that generates its rankings.
NN modelling requires a substantial database of reliable data with which the NN is trained to learn the relationship between the input space and the output parameter.
As the experiments comprehend both loading and unloading cycles, the results provide a substantial database for confrontation of constitutive models for soil-chain interaction.
There exists some measured data of random-incidence scattering coefficient for periodic surfaces, however a substantial database is not yet provided.
The process of real-time on-board bus location can result in a substantial database where the progress of the bus is stored typically on a second-by-second basis.
First we analyzed a substantial database of some 500,000 feedback instruments (commonly called 360-degree feedback reports) that pertain to approximately 50,000 managers.
Further experimental data need to be obtained on flow boiling of nanofluids, so as to have a more substantial database, and a better understanding on nanofluid flow boiling mechanisms.
Aware of these imperfections, this substantial database remains an important source of information.
Hence, whenever substantial database changes with a potential impact on SSD are occurring, reevaluation of the SSD performance is warranted.
A substantial knowledge database has been built up since then, in a variety of institutions, patient populations, and circumstances [ 16].
Because there is a substantial chronic database available for AES, including freshwater fish, rotifer, daphnids, freshwater clam, gastropod, caddisfly, and green algae which is described in details in HERA (2004), these data were used to derive the PNEC.
