func selectSchemaVersions(tx *sql.Tx) ([]int, error) {
	statement := `
SELECT version FROM schema ORDER BY version
`
	return query.SelectIntegers(tx, statement)
}
func selectSchemaVersions(tx *sql.Tx) ([]int, error) {
	statement := `
SELECT version FROM schema ORDER BY version
`
	return query.SelectIntegers(tx, statement)
}
func selectSchemaVersions ( tx * sql . Tx ) ( [ ] int , error ) { statement := `
SELECT version FROM schema ORDER BY version
` return query . SelectIntegers ( tx , statement ) }
// Return all versions in the schema table, in increasing order.
Return all versions in the schema table in increasing order .